| No. | Item | Definition |
|---|---|---|
| 1. | abatement | Removal of a hazardous condition |
| 2. | accountability | Tracking personnel and occupants |
| 3. | aerosol | Pressurized spray container |
| 4. | alarm | Warning signal of danger |
| 5. | annunciator | Display showing alarm locations |
| 6. | apparatus | Firefighting vehicle or equipment |
| 7. | arc | Electric discharge through air |
| 8. | arson | Criminal act of setting fire |
| 9. | backdraft | Explosive ignition from added oxygen |
| 10. | blaze | Large strong fire |
| 11. | blocked | Obstructed or closed off |
| 12. | capacity | Maximum number allowed inside |
| 13. | class A | Fires involving ordinary combustibles |
| 14. | class B | Fires involving flammable liquids |
| 15. | clearance | Required open space around hazards |
| 16. | code | Set of safety rules |
| 17. | combustible | Capable of burning |
| 18. | combustion | Chemical burning process |
| 19. | command | Authority directing operations |
| 20. | cylinder | Pressurized gas container |
| 21. | damper | Device controlling airflow in ducts |
| 22. | detector | Device that senses fire conditions |
| 23. | dispatch | Sending responders to an incident |
| 24. | drill | Practice emergency procedure |
| 25. | dry chemical | Powder extinguishing agent |
| 26. | duct | Passage for air movement |
| 27. | egress | Way out of a building |
| 28. | emergency | Serious unexpected dangerous situation |
| 29. | engine | Fire truck carrying water and hose |
| 30. | evacuate | Leave a dangerous place |
| 31. | evacuation | Organized movement out of danger |
| 32. | exit | Door or route to leave |
| 33. | explosive | Able to burst violently |
| 34. | extinguisher | Portable device for putting out fires |
| 35. | fire | Rapid burning producing heat and light |
| 36. | fireload | Amount of burnable material present |
| 37. | firestop | Material sealing fire openings |
| 38. | flame | Visible glowing gas in a fire |
| 39. | flammable | Easily set on fire |
| 40. | flashover | Sudden full-room fire involvement |
| 41. | foam | Bubbly agent for fire control |
| 42. | fuel | Material that burns |
| 43. | gasoline | Highly flammable liquid fuel |
| 44. | hazard | Source of possible harm |
| 45. | heat | Thermal energy causing rising temperature |
| 46. | horn | Audible warning device |
| 47. | hose | Flexible tube for water |
| 48. | housekeeping | General cleanliness and order |
| 49. | hydrant | Outdoor water access for firefighting |
| 50. | ignite | Set on fire |
| 51. | ignition | Start of combustion |
| 52. | impairment | System reduced or out of service |
| 53. | incident | Event requiring response |
| 54. | inferno | Very large destructive fire |
| 55. | inspection | Official examination for compliance |
| 56. | ladder | Truck with aerial ladder |
| 57. | latch | Fastening that keeps door closed |
| 58. | leak | Unintended escape of liquid or gas |
| 59. | life safety | Protection of people from danger |
| 60. | maintenance | Routine care to keep working |
| 61. | mitigation | Reducing severity of harm |
| 62. | noncombustible | Not capable of burning |
| 63. | nozzle | Device shaping water flow |
| 64. | obstruction | Something blocking passage or access |
| 65. | occupancy | Use or population of a building |
| 66. | origin | Place where fire started |
| 67. | overhaul | Final check for hidden fire |
| 68. | overload | Excess electrical demand |
| 69. | oxidizer | Substance promoting combustion |
| 70. | oxygen | Gas that supports combustion |
| 71. | penetration | Opening through a wall or floor |
| 72. | permit | Official authorization |
| 73. | preparedness | Readiness for emergencies |
| 74. | prevention | Stopping fires before they start |
| 75. | propane | Flammable gas used as fuel |
| 76. | pull station | Manual fire alarm activator |
| 77. | pump | Machine moving water or fluid |
| 78. | rated | Assigned a tested fire resistance |
| 79. | report | Official written account |
| 80. | rescue | Saving people from danger |
| 81. | response | Action taken to address danger |
| 82. | short circuit | Unintended low-resistance connection |
| 83. | smoke | Airborne particles from burning material |
| 84. | sprinkler | Automatic water fire suppression device |
| 85. | standpipe | Building pipe for firefighting water |
| 86. | stream | Directed flow of water |
| 87. | strobe | Flashing visual warning light |
| 88. | supervisory | Signal showing system condition |
| 89. | suppression | Actions that control or extinguish fire |
| 90. | testing | Checking system performance |
| 91. | toxic | Poisonous or harmful |
| 92. | training | Instruction for safe performance |
| 93. | trouble | Signal showing system problem |
| 94. | valve | Device controlling fluid flow |
| 95. | ventilation | Movement of fresh air |
| 96. | violation | Failure to follow rules |
| 97. | warden | Person directing emergency actions |
| 98. | water | Liquid used to cool fires |
| 99. | wildfire | Uncontrolled fire in vegetation |
| 100. | wiring | Electrical conductors in a building |
