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Newest Terms
- 5 Why Analysis
- A-Weighting
- Abrasion
- Abrasion Resistance
- Abrasion-Resistant Gloves
- Absenteeism
- Absorption Spectroscopy
- Acceptable Exposure Levels
- Accident
- Accident Analysis
- Accident Causation
- Accident Causation Model
- Accident Investigation
- Accident Precursor Analysis
- Accident Prevention
- Accident Rate
- Accident Statistics
- Acid
- Acid Gas Removal
- ACM Waste
- Acoustic Trauma
- Acquired Immune Deficiency Syndrome
- Active Safety
- Activity Hazard Analysis
- Acute Effect
- Acute Exposure
- Acute Hazard
- Acute Health Effect
- Acute Silicosis
- Acute Toxicity
- Additive Effects
- Adjustable Suspension Scaffold
- Administrative Controls
- Administrative Safeguards
- Aerosol
- Agency for Toxic Substances and Disease Registry
- Agricultural Waste
- Air Curtain
- Air Exchange Rate
- Air Filter
- Air Pollution
- Air Pollution Control
- Air Purifier
- Air Quality
- Air Quality Control Region
- Air Quality Monitor
- Air Sampling
- Air-Purifying Respirator
- Alarm System
- ALARP
- Allergen
- Allergic Contact Dermatitis
- Allergy Test
- Alma-Ata Declaration
- Alpha Radiation
- Alternative Concentration Limit
- Alternative Fuel
- Ambient Air
- Ambient Air Breathing Apparatus
- Ambient Noise
- American College of Occupational and Environmental Medicine
- American Concrete Institute
- American Conference of Governmental Industrial Hygienists
- American Industrial Hygiene Association
- American Institute of Electrical Engineers
- American National Standard for Industrial Head Protection
- American National Standards Institute
- American Petroleum Industry
- American Petroleum Institute
- American Safety & Health Institute
- American Section of the International Association for Testing Materials
- American Society for Testing and Materials
- American Society of Heating, Refrigeration and Air Conditioning Engineers
- American Society of Quality
- American Society of Safety Professionals
- American Wire Gauge
- Ames Test
- Amine Gas Treating
- Amino Acid
- Ampacity
- Amperage
- Ampere
- Anaerobic Respiration
- Anchor Point
- Anchorage
- Anechoic Chamber
- Anhydrous Ammonia
- ANSI Z10
- ANSI Z359
- Anthropocentrism
- Anti-Fog Safety Glasses
- Anti-Static Label
- Anti-Vibration Gloves
- Aramid
- Arbitration
- Arc Blast
- Arc Flash
- Arc Flash Audit
- Arc Flash Calculations
- Arc Flash Hazard Assessment
- Arc Rating
- Arc Thermal Performance Value
- Arc-Flash Boundary
- Arcing
- Area of Contamination
- Area Sampling
- Arsenic Poisoning
- As Low as Reasonably Practicable
- Asbestos
- Asbestos Exposure
- Asbestos-Containing Material
- Asbestosis
- Asphyxiant
- Aspiration Hazard
- Assigned Protection Factor
- Associate Environmental Professional
- Associate Safety Health Manager
- Associate Safety Professional
- Association for Occupational and Environmental Clinics
- ASSP Conference
- At-Height Tools
- ATEX Certification
- Atmosphere
- ATmosphere EXplosible
- Atmospheric Deposition
- Atmospheric Pollution
- Atom
- Atomic Number
- Attenuation
- Audible Range
- Audiogram
- Audiometric Testing
- Audiometry
- Auditor
- Autoignition Temperature
- Autoimmune Disease
- Automated External Defibrillator
- Automatic Darkening Welding Filter
- Aviation Safety Action Program
- Background Check
- Background Level
- Background Radiation
- Bacteria
- Balance of Probabilities
- Band Top
- Barrier Islands
- Batesian Mimicry
- Bee Spray
- Behavior-Based Observation
- Behavior-Based Safety
- Benhixu Colliery
- Benign Tumor
- Benzene Poisoning
- Best Available Control Measures
- Best Available Control Technology
- Best Practical Control Technology
- Best Practice
- Beta Particles
- Bhopal Disaster
- Bio-Safety Level
- Biocide
- Biodegradable Waste
- Biodegradation
- Biodiversity
- Bioenergy
- Biohazard Containers
- Biological Agent
- Biological Hazard
- Biological Monitoring
- Biological Oxygen Demand
- Biomass Fuel
- Biomass Pyramid
- Biome
- Biosphere
- Biotic
- Biotic Potential
- Black Lung Disease
- Blast Wave
- Blasting Agent
- Blister
- Blood Agent
- Blood Spill Kit
- Bloodborne Pathogen
- Blowout
- Board of Certified Safety Professionals
- Board of Environmental, Health & Safety Auditors
- Body Mapping
- Boreal Forest
- Bottled Gas
- Boudouard Reaction
- Bovine Spongiform Encephalopathy
- Breakthrough Time
- Breathing Zone
- Buddy System
- Bug Bite
- Building Code
- Building Control Body
- Bump Cap
- Bump Test
- Bureau of Labor Statistics
- Burn
- Burn Gel
- Business Continuity Plan
- Business Standards International
- By-product
- C-Weighting
- Calibrated Risk Graph
- Calibrated Risk Graph Method
- Calibration
- Canadian Registered Safety Professionals
- Cancer
- Carbogen
- Carbohydrate
- Carbon Cycle
- Carbon Dioxide
- Carbon Dioxide Fire Extinguisher
- Carbon Dioxide Sensor
- Carbon Dioxide Sink
- Carbon Monoxide
- Carbon Monoxide Breath Monitor
- Carbon Monoxide Detector
- Carbon Monoxide Poisoning
- Carbon Sink
- Carcinogen
- Carcinogenic
- Carcinogens
- Cardiac Arrest
- Cardiac Arrhythmia
- Cardiopulmonary Resuscitation
- Cardiopulmonary Resuscitation Certification
- Carnivores
- Carpal Tunnel Syndrome
- Cartridge Dust Collectors
- CAS Number
- CAS Registry Number
- Catalysis
- Catalyst
- Caustic Compound
- Caustic Storage Building
- Caustic Substance
- Caution Tape
- CE Rating
- Ceiling Exposure Level
- Ceiling Limit
- Cell
- Cellular Respiration
- Center of Visual Expertise
- Centers for Disease Control
- Central Nervous System
- Centrifugal Fan
- Certificate in Construction Health and Safety
- Certificate in Environmental Management
- Certificate in Occupational Health & Safety Management
- Certificate in the Management of Health and Well-being at Work
- Certificate of Competency
- Certificate of Conformity
- Certificate of Fitness
- Certificate of Professional Competence
- Certificate of Recognition
- Certification in Safety Management
- Certification Maintenance
- Certified Ergonomics Assessment Specialist
- Certified Ergonomics Evaluation Specialist
- Certified Fire Protection Specialist
- Certified Hazard Control Manager
- Certified Hazardous Materials Management
- Certified Healthcare Safety Professional
- Certified Homeland Security Manager
- Certified Human Resource Professional
- Certified Industrial Hygienist
- Certified Loss Control Specialist
- Certified Occupational Health Nurse
- Certified Occupational Safety Specialist
- Certified Professional Environmental Auditor
- Certified Professional Ergonomist
- Certified Professional in Healthcare Risk Management
- Certified Safety & Health Management
- Certified Safety & Health Professional
- Certified Safety Professional
- Certified Utility Safety Administrator
- Certified Utility Safety Professional
- Chainsaw Chaps
- Checklist Analysis
- Chemical Reaction
- Chemical Absorption
- Chemical Agent
- Chemical Bond
- Chemical Burn
- Chemical Energy
- Chemical Eye Injury
- Chemical Hazard Information Profile
- Chemical Hazards Information Profiles
- Chemical Hold-Out
- Chemical Manufacturer
- Chemical Oxygen Demand
- Chemical Protective Clothing
- Chemical Resistance
- Chemical Safety
- Chemical Safety and Hazard Investigation Board
- Chemical Storage Building
- Chemical Transportation Emergency Center
- Chemical-Resistant Gloves
- Chest Radiography
- Chilblains
- Chlorofluorocarbons
- Chloroflurocarbons
- Chloroplasts
- Chromated Copper Arsenate
- Chronic Effect
- Chronic Exposure
- Chronic Food Shortages
- Chronic Hazard
- Chronic Health Effect
- Chronic Obstructive Pulmonary Disease
- Chrysiasis
- Citizen Science
- Class 1 High-Visibility Apparel
- Class 2 High-Visibility Apparel
- Class 3 High-Visibility Apparel
- Class A Fire
- Class B Fire
- Class C Fire
- Class D Fire
- Clean Air Act
- Clean Air Delivery Rate
- Clean Water Act
- Cleanroom
- Cleanroom Apparel
- Clearance Guide
- Cloud Forests
- Clute Cut
- CO2 Sequestration
- Coal Washing
- Code of Practice
- Cognitive Ergonomics
- Cold Front
- Coliform Bacteria
- Collapse
- College of Public Health & Health Professionals
- Collision
- Color Coding
- Combustible
- Combustible Dust
- Combustible Dust Fire
- Combustible Limit
- Combustible Liquids
- Combustion Point
- Commensalism
- Commercial Waste
- Communicable Disease
- Compensable Injury
- Compensation Claim
- Compensation Costs
- Competent Person
- Competitive Exclusion
- Compliance
- Compliance Test
- Comprehensive Environmental Response Compensation Liability Act
- Compressed Air Breathing Apparatus
- Compressed Gas
- Computer Aided Design
- Concentration Units
- Condensate Gases
- Condensation
- Confined Space
- Confined Space Gas Detector
- Confined Space Rescue
- Conifers
- Conservation of Matter
- Construction Contractor
- Construction Hazardous Waste Disposal
- Construction Health & Safety Technicians
- Construction Health, Safety and Welfare Regulations
- Construction Management Agreement
- Construction Risk and Insurance Specialist
- Construction Safety
- Construction Safety & Health Official
- Construction Safety Plan
- Construction Safety Specialist
- Construction Site Safety Supervisor
- Construction Site Safety Technician
- Consultation
- Consumer Product Safety Commission
- Consumption
- Contact with Heat
- Container
- Contaminant
- Contamination
- Continuous Improvement
- Continuous Positive Airway Pressure
- Contour Plowing
- Contractor
- Contractor Compliance
- Contractor Due Diligence
- Contractor Management
- Contractor Management Services
- Contractor Onboarding
- Contractor Prequalification
- Contractor Safety Management System
- Contributory Negligence
- Control
- Control of Substances Hazardous to Health
- Control Systems HAZOP
- Control Techniques Guidelines
- Controlled Product
- Contusion
- Cool Deserts
- Coral Reefs
- Core Competencies
- Correction Factor
- Corrective Actions
- Corrective and Preventative Action
- Corrosion
- Corrosion Inhibitor
- Corrosive
- Corrosive Material
- Corrosive Storage Cabinet
- Cost-Benefit Analysis
- Crane Operator Certification
- Creep Resistance
- Critical Injury
- Critical Thinking
- Crude Birth Rate
- Crude Death Rate
- Crushing
- Crust
- Cryogenics
- Cryptosporidium
- Cubic Feet Per Minute
- Cumulative Trauma Disorder
- Current Relay
- Custom Molded Earplugs
- Cut-Resistant Gloves
- Cutaneous Hazard
- Cutaneous Necrotizing Vasculitis
- Cycle Ergometer
- Cyclone Separator
- D-ring
- Danger Zone
- Dangerous Goods
- Dangerous Substance Directive
- Data Cabinet
- Daylight Factor
- Days Away from Work Case
- Days Away, Restricted, or Transferred
- Dead Load
- Decibel
- Decomposers
- Decontamination Unit
- Deductive Reasoning
- Defibrillation
- Deflagration Potential
- Degradation
- Dehydration
- Deliberative Agent
- Density
- Deoxyribonucleic Acid
- Dermal Absorption
- Designated Substance
- Destructive Testing
- Detonation Flame Arrester
- Detonation Resistor
- Dielectric Material
- Dipped Gloves
- Direct Venting
- Disability Assessment
- Disability Insurance
- Disabling Injury
- Disease
- Disinfectant
- Disposable Apparel
- Disposable Coveralls
- Distilled Spirits
- Distracted Driving
- Distributor (OSHA)
- Document Control
- Domino Theory
- Dose Rate
- Dosimeter
- Double-Legged Shock Absorbing Lanyard
- Drip Irrigation
- Drop Test
- Dropped Objects
- Drug and Alcohol Test
- Drug Efficacy Study Implementation
- Drug Therapy
- Drum Storage Containers
- Drunk Driving
- Dry Bulb Temperature
- Dry Fire Main
- Dry Ice
- Dry Particulate
- Dry-Pipe Sprinkler System
- Due Diligence
- Duration of Reaction Time
- Dust
- Dust Explosion
- Dust Suppression Equipment
- Duty of Care
- Dyneema
- E-Stop Switch
- Earmuffs
- Earplugs
- Earthquakes
- Ecogenetics
- Ecological Economics
- Edge Effects
- Effective Dose 50
- EH40
- Elastikon Tape
- eLearning
- Electric Arc
- Electric Receptacles
- Electrical Safety
- Electrical Shock
- Electrical Single Line Diagram
- Electronic Waste
- Electrostatic Discharge
- Electrostatic Dissipation
- Electrostatic Precipitator
- Emergency
- Emergency Brake
- Emergency Escape Lighting
- Emergency Evacuation Plan
- Emergency Exit
- Emergency Eyewash Station
- Emergency Life Support Apparatus
- Emergency Lighting
- Emergency Management Specialist
- Emergency Medical Responder
- Emergency Medical Services
- Emergency Medical Technician
- Emergency Mobile Showers
- Emergency Preparedness
- Emergency Response
- Emergency Shower
- Emission Standards
- Employee Assistance Program
- Employee Exposure
- Employment Discrimination
- Employment Medical Advisory Service (EMAS)
- Encapsulated Suit Level
- Encapsulation
- End of Service Life Indicator
- Energy
- Energy Break-Open Threshold
- Energy Pyramid
- Engineered Yarns
- Engineering Controls
- Entanglement Injury
- Environment Agency
- Environmental Engineering
- Environmental Factors Causing Accidents
- Environmental Hazard
- Environmental Health & Safety Management
- Environmental Health and Safety (EH&S)
- Environmental Health Officer
- Environmental Impact
- Environmental Management
- Environmental Monitoring
- Environmental Science
- Environmental Services
- Environmental Toxicology
- Enzymes
- Epidemiology
- Epiphyte
- Equal Employment Opportunity Commission
- Equal-Loudness Contour
- Equipment Failure
- Equipment Operator
- Equipotential Bonding
- Ergonomic Hazards
- Ergonomic Injury
- Ergonomic Principles
- Ergonomics
- Error Rate Prediction
- Escape Route
- Escape Time
- Ethanol
- Ethylene Oxide
- European Inventory of Existing Commercial Chemical Substances
- European List of Notified Chemical Substances
- European Medicines Agency
- European Standards for Protective Gloves
- Evacuation Lift
- Evaporation Rate
- Event Reporting
- Event Tree
- Event Tree Analysis
- Evolution
- Ex Rated
- Exhaustion
- Experience Modification Rate
- Expert Witness
- Explosion Class 1
- Explosion Class 2
- Explosion Class 3
- Explosion Proof
- Explosion Proof Protection
- Explosive
- Explosive (Flammable) Limits
- Explosive (Flammable) Range
- Explosive Chemical
- Explosive Liquids
- Exposure
- Exposure Level
- Exposure Limit
- Exposure Record
- Eye Hazard
- Eye Protection
- Eye Protection Safety
- Eye Protector
- Eye Redness
- Eye Trauma
- Eye Wash
- Eyewash Cup
- Eyewash Solution
- Face Protection
- Facility Identification
- Facility Siting
- Factor of Safety
- Failure Mode Effects and Criticality Analysis
- Failure Modes and Effects Analysis
- Fall Arrest
- Fall Arrest System
- Fall Energy
- Fall Hazard
- Fall Limiter
- Fall Protection
- Fall Protection Plan
- Fall-Protection Rescue Plan
- Fatal Four
- Fatal Incident
- Fatality
- Fatigue
- Fault Tree Analysis
- FDA Food Safety Modernization Act
- Federal Insecticide, Fungicide, and Rodenticide Act
- Fermentation
- Fetal Alcohol Syndrome
- Fibers Per Cubic Centimeter of Air
- Fibre Metal Hard Hats
- Fibrosis
- Field Level Hazard Assessment
- Field Level Risk Assessment
- Filter
- Filtering Facepiece
- Final Exit
- Finger Tape
- Fingertip Bandage
- Fire Alarm
- Fire Blanket
- Fire Compartment
- Fire Door
- Fire Extinguisher
- Fire Extinguisher Ratings
- Fire Fighter
- Fire Fighting Equipment
- Fire Hazards
- Fire Hose
- Fire Hydrant
- Fire Inspection
- Fire Load
- Fire Marshal
- Fire Permit
- Fire Point
- Fire Precautions
- Fire Prevention
- Fire Protection
- Fire Protection Association
- Fire Protection Measures
- Fire Retardant
- Fire Risk Assessor
- Fire Safety
- Fire Safety Director
- Fire Safety Engineering
- Fire Safety Lesson Plan
- Fire Safety Manager
- Fire Safety Plan
- Fire Suppression System
- Fire Tetrahedron
- Fire Triangle
- Fire Watch
- First Aid
- First Aid Incidents
- First Aid Kit
- First Aid Sign
- First Exposure Symptom
- First Exposure Time
- First Responder
- First Responders Reaction Time
- Fit For Duty
- Fixed Interlocked Automatic & Trip
- Flame Arrester
- Flame Resistant
- Flame-Resistant Clothing
- Flammability Limit
- Flammability Limit of Liquids
- Flammability Range
- Flammable
- Flammable Aerosol
- Flammable Cabinet
- Flammable Gas
- Flammable Liquid
- Flammable Solid
- Flammable Storage Container
- Flash Fire
- Flash Hazard Analysis
- Flash Point
- Flashback Arrester
- Flashpoint
- Flexible Wiring
- Floor Marking Tape
- Flora
- Flue-Gas Scrubbing
- Foam Extinguishing System
- Food Aid
- Food and Drug Administration
- Food Chain
- Food Handlers Card
- Food Security
- Foot Protection
- Foreign Body
- Foreign Object Damage
- Foreseeable Emergency
- Forklift
- Forklift Certification
- Forklift Safety
- Fossil Fuels
- Fourchette
- Fourth World
- Fracture / Dislocation
- Free Fall
- Freecycle
- Freedom of Information
- Freezing Point
- Freshwater Ecosystems
- Friable Asbestos
- Frostbite
- Fuelwood
- Fugitive Emissions
- Full Body Harness
- Full Brim Hard Hats
- Full Face Respirator
- Fume Cupboard
- Fumes
- Functional Safety
- Fungicide
- Gaia Hypothesis
- Galvanic Corrosion
- Gas
- Gas Detection
- Gas Mask
- Gas Monitors
- Gas Sweetening
- Gasotransmitter
- Gauntlet Cuff
- Gauntlets
- Gemba Walk
- General Fall Arrest System
- General Medical Council
- Genetic Engineering
- Germ
- Germ Plasm
- GHS Compliance
- GHS Hazard Statement List
- Glare
- Global Warming
- Globally Harmonized System
- Glove Clips
- Good Manufacturing Practices
- Green Guard Environmental Institute
- Greenhouse Gas Effect
- Ground Fault Circuit Interrupter
- Groundwater
- Guardrails
- H2S
- H2S Alive
- H2S Exposure Limits
- H2S Safety Services
- H2S Training
- Hadley Cells
- Half Mask
- Halifax Explosion
- Hand Arm Vibration Syndrome
- Hand Protection
- Hand Sanitizer
- Hand Shield
- Harassment
- Hard Hat
- Hazard
- Hazard Analysis
- Hazard Analysis and Critical Control Points
- Hazard and Operability Study
- Hazard Assessment
- Hazard Category
- Hazard Classes
- Hazard Codes
- Hazard Communication Standard
- Hazard Control
- Hazard Exposure
- Hazard Identification
- Hazard Identification Study
- Hazard Not Otherwise Classified (HNOC)
- Hazard Risk Category
- Hazardous Atmosphere
- Hazardous Chemical
- Hazardous Contaminants
- Hazardous Decomposition Products
- Hazardous Material Storage
- Hazardous Materials Diamond
- Hazardous Materials Incident
- Hazardous Materials Investigation System
- Hazardous Polymerization
- Hazardous Production Material
- Hazardous Products Act
- Hazardous Substance
- Hazardous Waste
- Hazardous Waste Disposal
- Hazardous Waste Operations and Emergency Response
- Hazards Closed Out
- Hazards Reported
- HazChem
- Hazmat Decontamination
- HAZMAT Suit
- HAZMAT Team
- HAZMAT Training
- Head Protection
- Health and Safety at Work etc. Act 1974
- Health and Safety Commission (HSC)
- Health and Safety Executive
- Health and Safety Laboratory (HSL)
- Health and Safety Officer (Safety Officer)
- Health and Safety Plan
- Health and Safety Policy
- Health Hazard (OSHA)
- Health Monitoring
- Health Risk Assessment
- Health Standards Inspector
- Healthcare
- Healthcare Provider
- Hearing Conservation Amendment (CFR1910.95)
- Hearing PPE (Hearing Protector)
- Heat Capacity
- Heat Exhaustion
- Heat Syncope
- Heat-Related Illness
- Heat-Stroke
- Heating Ventilating and Air Conditioning
- Heatstroke
- Heavy Metals
- Hepatitis B
- Hepatitis C
- Hepatotoxin
- Hierarchy of Hazard Control
- High Efficiency Gas Absorber
- High Efficiency Particulate Absorption
- High Risk License
- High Visibility Jackets
- High Visibility Safety Apparel
- High Visibility T-Shirts
- High Visibility Vests
- High Voltage
- High-Impact, Low-Frequency
- High-Quality Energy
- High-Visibility Rainwear
- High-Visibility Safety Gloves
- High-Visibility Winter Workwear
- High-Visibility Workwear
- Hold Time
- Holistic Science
- Homeostasis
- Host Organism
- Hot Work
- Hot Work Permit
- Household Hazardous Waste Storage
- Housekeeping
- Human Factors Causing Accidents
- Human Resource Management
- Hydraulic Platform
- Hydrogen Peroxide
- Hydrogen Sulfide
- Hygrometer
- Hypertension
- Hypothermia
- IBC Storage Locker
- IEC 61511
- Ignition Source
- Immediately Dangerous to Life or Health
- Immersion
- Impact Resistance
- Impulse Noise
- Incident
- Incident Energy
- Incident Investigation
- Incident Management
- Incident Report
- Incinerator
- Indirect Venting
- Indoor Air Quality
- Inductive Reasoning
- Industrial Ergonomics
- Industrial Hygiene
- Industrial Hygiene Monitoring
- Industrial Hygienist
- Industrial Revolution
- Industrial Safety
- Industrial Safety Training Council
- Inerting
- Infection Prevention and Control
- Infiltration
- Inflammable
- Inflammation
- Infrared Radiation
- Ingestion
- Inhalation Exposure
- Injury Frequency Rate
- Injury Severity Rate
- Inner Room
- Inspection Phase
- Institute of Electrical and Electronics Engineers
- Institute of Environmental Sciences and Technology
- Institute of Hazardous Material Management
- Institute of Occupational Safety & Health
- Institute of Occupational Safety and Health
- Instrumental Value
- Insulation
- Integrated Pest Management
- Interactive Safety Signs
- Interim Life Safety Measures
- Internal Investigation
- International Agency for Research on Cancer
- International Association of Certified Indoor Air Consultants (IAC2)
- International Certificate in Construction Health and Safety
- International Diploma in Occupational Health & Safety
- International Fire Code
- International General Certificate in Occupational Health and Safety
- International Institute of Risk & Safety Management
- International Organization for Standardization
- International Standard Organization
- International Technical Certificate in Oil & Gas Operational Safety
- Interpretive Science
- Intrinsic Safety
- Intrinsically Safe
- Ionization Smoke Detector
- Ionizing Radiation
- Ionosphere
- Ions
- Irritant Chemical
- Irruptive Growth
- ISO 45001
- Isocyanate
- Isotopes
- Job Design
- Job Hazard Analysis
- Job Rotation
- Job Satisfaction
- Job Security
- Joint Institution Group on Safety and Risk
- Joule
- Journey Management Plan
- Kaizen
- Kevlar
- Kevlar Gloves
- Kevlar Sleeves
- Keystone Species
- Keystone Thumb
- Kinetic Energy
- Knit Wrist Cuffs
- Knuckle Strap
- Kyoto Protocol
- Laceration
- Lagging Indicators
- Land Transport Authority
- Landfill
- Landscape Ecology
- Layer of Protection Analysis
- LD50
- Leading Edge
- Leading Indicators
- Leak Detection
- Leave of Absence
- Lethal Concentration 50
- Lethal Dose 50
- Lethal Dose Low
- Level A Clothing
- Level B Clothing
- Level C Clothing
- Level D Clothing
- Licensed Safety Engineer
- Life Savers
- Life Span
- Lifting Operations and Lifting Equipment Regulations (LOLER)
- Lifting Slings
- Light Emitting Diode
- Light Liquid Splash
- Lipid
- Liquefied Petroleum Gas
- Liquid Crystal Display
- Liquid Metal Fast Breeder
- Lithium Battery Storage
- Litter
- Live Load
- Load Capacity
- Loading Dock
- Local Exhaust Ventilation
- Lock Off
- Lockout Kit
- Lockout Tagout
- Logistic Growth
- Lone Worker
- Loss Control
- Loss Control Management
- Loss Prevention
- Lost Days
- Lost Time Claims
- Lost Time Injury
- Lost Time Injury Frequency Rate
- Lost Time Injury Incidence Rate
- Lost Workday Rate
- Low-Quality Energy
- Lower Explosive Limit
- Lower Flammability Limit
- Lumbar
- Lumen
- Machine Guards
- Magma
- Magnetic Confinement
- Magnetic Field
- Malignant Tumor
- Malnourishment
- Management of Change
- Mantle
- Manual Handling
- Manual of Permitted Operations
- Market Equilibrium
- Mass Burn
- Master Code Professional
- Masters in Public Health
- Masters of Science in Public Health
- Material Handling Carts
- Material Safety Data Sheet
- Maximum Arresting Force
- Maximum Exposure Limit
- Maximum Use Concentration
- Mean Time Between Failures
- Means of Escape
- Mechanical Biological Treatment
- Mechanical Factors Causing Accidents
- Mechanical Integrity
- Median Lethal Dose
- Mediation
- Medical Aid Incidents
- Medical Surveillance
- Medical Waste
- Mediterranean Climate Areas
- Megacity
- Megalopolis
- Megawatt
- Melting Point
- Mesosphere
- Mesothelioma
- Metal Fumes
- Metamorphic Rock
- Metatarsal Guards
- Methane Hydrate
- Methanol
- Method Statement
- Micro-Hydro Generators
- Microporous Protection
- Mil
- Milankovitch Cycles
- Miller Fall Protection
- Milligram Per Cubic Meter
- Milpa Agriculture
- Mine Safety
- Mist
- Mitigation
- Mixed Perennial Polyculture
- Modular System
- Moisture Vapor Transmission Rate
- Mold
- Monkey Wrenching
- Monsoon
- Montane Coniferous Forests
- Moral Extensionism
- Morals
- Morbidity
- Mulch
- Municipal Waste
- Muscle Strain
- Musculoskeletal Disorders
- Musculoskeletal Injuries
- Muster Area
- Muster Drill
- Muster Point
- Mutagens
- Mutation
- Mutualism
- Nanotechnology
- Narcotic
- Natality
- National Advisory Committee on Occupational Safety and Health
- National Ambient Air Quality Standards
- National Certificate in Environmental Management
- National Construction Safety Officer
- National Diploma in Occupational Health & Safety
- National Electrical Code
- National Examination Board in Occupational Safety and Health
- National Fire Protection Association
- National Health Service
- National Highway Traffic Safety Administration
- National Institute for Occupational Safety and Health
- National Institute of Standards and Technology
- National Labor Relations Board
- National Parks and Wildlife Service
- National Safety Council
- National Safety Month
- National Spatial Strategy
- National Toxicology Program
- National Transportation Safety Board
- National Vocational Qualification
- Natural Gas
- Natural Resources
- Natural Selection
- Natural Ventilation
- Near Miss
- Negative-Pressure Respirator
- Negligence
- Neo-Luddites
- Neo-Malthusian
- Nephrotoxin
- Net Energy Yield
- Neurotoxins
- Neutron
- New Employee Orientation
- NFPA 704
- Nihilists
- NIOSH Recommended Exposure Limit
- Nitrile
- Nitrile Glove Allergy
- Nitrile Rubber
- Nitrogen Cycle
- Nitrogen Oxides
- Nitrogen-Fixing Bacteria
- No Treatment Incident
- Noise (environmental)
- Noise Control
- Noise Pollution
- Noise Reduction Coefficient
- Noise Reduction Rating
- Noise Signal
- Noise-Induced Hearing Loss
- Non Occupational Incident
- Non Recordable Incident
- Non-Attainment Area
- Non-Criteria Pollutants
- Non-Hazardous Contaminants
- Non-Point Source
- Non-renewable Resources
- Non-Slip Mat
- Noncompliance
- Norovirus
- Northern Supply
- Not In My BackYard
- Nuclear Fission
- Nuclear Fusion
- Nuclear Power
- Nuclear Reactor
- Nucleic Acids