火燵掛布[kotatsugake] cover for kotatsu
火燵布団[kotatsubuton] cover for kotatsu
引火[inka] catching fire
引火温度[inkaondo] flash temperature
引火点[inkaten] flash point

曳火弾[eikadan] tracer bullet
煙火[enka] smoke and fumes (e.g. from cooking)
遠火[toobi] distant fire
下火[shitabi] burning low
下火になる[shitabininaru] to be under control

臼砲[kyuuhou] mortar
加農砲[kanouhou] cannon
火砲[kahou] artillery
巨砲[kyohou] huge gun
曲射砲[kyokushahou] howitzer

剣付き鉄砲[kentsukideppou] fixed bayonet
原子砲[genshihou] atomic cannon
午砲[gohou] noon gun
高射砲[koushahou] antiaircraft gun
号砲[gouhou] signal gun