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

火焔放射器[kaenhoushaki] flamethrower
気焔万丈[kienbanjou] in high spirits
光焔[kouen] light and flame
紅焔[kouen] red flame
火焔[kaen] flame

情焔[jouen] burning passion
気焔[kien] high spirits
焔硝[enshou] gunpowder
残焔[zanen] lingering heat (in autumn)