The three elements necessary and sufficient to sustain a fire: fuel (e.g. wood or petrol/gasoline), oxidizer (e.g. oxygen), and sufficient heat (e.g. reaction temperature or activation energy).

A fire alarm system.

alternative form of grassfire

(UK, slang, dated) Sensational romanticism. / (literally) A fire that burns a blue color.

A fire drill

The act of putting fire into one's mouth and extinguishing it.

plural of fire controlman

(US, military) A member of the Navy who carries out repairs and maintenance on weapons, computers, and other equipment.

Alternative form of fire-worship

The worship of fire or of a fire god or goddess.