嬲る[naburu] to tease
嬲り殺し[naburigoroshi] torture to death

火嬲り[hiijiri] playing with fire

弄りまわす[ijirimawasu] to tinker with
玩弄[ganrou] make sport of
玩弄物[ganroubutsu] plaything
愚弄[gurou] mockery
飜弄[honrou] trifling with

弄する[rousuru] to play with
弄り[ijiri] meddling
弄る[ijiru] to touch
嘲弄[chourou] scorn
弄ぶ[moteasobu] to play with (a toy, one's hair, etc.)

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