どん底[donzoko] very bottom
井底[seitei] well bottom
海底[kaitei] bottom of the ocean
海底ケーブル[kaiteikeeburu] undersea cable
丸底[maruzoko] round-bottom

基底[kitei] base
靴底[kutsuzoko] shoe sole
黒底翳[kurosokohi] black cataract
根底[kontei] root
周知徹底[shuuchitettei] (something) known to all

一眼[ichigan] one eye
一眼レフ[ichiganrefu] single-lens reflex camera
一隻眼[issekigan] sharp eye
遠眼[engan] farsightedness
遠眼鏡[toomegane] spectacles for far-sightedness

凹眼[ougan] cavernous eyes
凹眼鏡[ougankyou] concave glasses
開眼[kaigan] enlightenment
眼下[ganka] under one's eyes
眼科[ganka] ophthalmology

腋窩[ekika] armpit
山窩[sanka] group of mountain nomads (in Japan)
眼窩[ganka] eye socket
腋窩腺[ekikasen] axillary gland
燕窩[enka] swift's nest (used to make bird's nest soup)

中心窩[chuushinka] fovea centralis
眼窩底[gankatei] orbital floor (thin bone floor of eye socket)
蜂窩[houka] wasp nest
私窩子[shikashi] prostitute
膝窩[shikka] popliteal fossa