一枚岩[ichimaiiwa] monolith
火山岩[kazangan] volcanic rock
火成岩[kaseigan] igneous rock
かこう岩[kakougan] granite
岩塩[ganen] halite

岩屋[iwaya] cavern
岩角[iwakado] edge or corner of a stone
岩間[iwama] among rocks
岩山[iwayama] rocky mountain

機関[karakuri] mechanism
アナログ計算機[anarogukeisanki] analog computer
エンジン発動機[enjinhatsudouki] engine
サーボ機構[saabokikou] servomechanism
シフト演算機構[shifutoenzankikou] shift arithmetic unit

ジェット機[jettoki] jet aeroplane
弾機[hatsujou] spring (e.g. coil, leaf)
ヒグス機構[higusukikou] Higgs mechanism (physics)
プロペラ機[puroperaki] propeller-driven aircraft
圧延機[atsuenki] rolling machine

開鑿[kaisaku] excavation
円鑿[marunomi] (a) gouge
鑿井[sakusei] well drilling
鑿岩機[sakuganki] rock drill
掘鑿[kussaku] digging out

穿鑿[sensaku] scrutiny
斧鑿[fusaku] lucubration
平鑿[hiranomi] flat chisel
鎬鑿[shinoginomi] chisel for making dovetail joints