一弦琴[ichigenkin] single-stringed Japanese zither
琴線[kinsen] heartstrings
三角琴[sankakugoto] trigon (a musical instrument)
手風琴[tefuukin] accordion
心の琴線[kokoronokinsen] heartstrings

たて琴[tategoto] harp
風琴[fuukin] organ
木琴[mokkin] xylophone
提琴[teikin] tiqin (2 or 4-stringed Chinese instrument played with a bow)

インディア紙[indiakami] India paper
クラフト紙[kurafutoshi] craft paper
ケント紙[kentoshi] Kent paper
リトマス試験紙[ritomasushikenshi] litmus paper
一紙半銭[isshihansen] small sum

陰画紙[ingashi] (photographic) printing paper
印刷紙[insatsushi] printing paper
印紙[inshi] (revenue) stamp
烏紙[karasugami] coarse dark-brown paper
黄表紙[kibyoushi] illustrated storybook with yellow covers (Edo period)

胸腔[kyoukou] thorax
口腔外科[koukuugeka] dental surgery
耳腔[jikou] inside the ear
体腔[taikou] body cavity
体腔壁[taikouheki] body wall

内腔[naikou] lumen (anatomical)
口腔[koukou] the oral cavity
鼻腔[bikou] the nasal cavity
腹腔[fukkou] abdominal cavity
口腔癌[koukougan] oral cancer