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

ゼロ地点[zerochiten] ground zero
圧痛点[attsuuten] pressure point
一致点[icchiten] point of agreement
一点[itten] speck
一点機[ichitenki] turning point

一点張り[ittenbari] persistence
引火点[inkaten] flash point
遠地点[enchiten] apogee
遠日点[enjitsuten] aphelion

雁爪[ganzume] Japanese rake
糸爪[hechima] sponge gourd
爪で拾って箕で零す[tsumedehirottemidekobosu] penny wise and pound foolish
爪痕[tsumeato] fingernail mark
爪先[tsumasaki] tiptoe

爪先で歩く[tsumasakidearuku] to tiptoe
爪弾き[tsumahajiki] black sheep (of a family)
爪楊枝[tsumayouji] toothpick
爪立ち[tsumadachi] standing on tiptoes