兎や角言う[toyakakuiu] to say all kinds of things
まっ四角[masshikaku] square
アフリカの角[afurikanotsuno] horn of Africa
一角[ikkaku] corner
一角の人物[hitokadonojinbutsu] somebody (important)

一角獣[ikkakujuu] unicorn
烏犀角[usaikaku] black rhinoceros horn
鋭角[eikaku] acute angle
外角[gaikaku] outside corner
町角[machikado] street corner

五寸釘[gosunkugi] long nail
間釘[aikugi] double-pointed nail
出る釘は打たれる[derukugihautareru] the nail which sticks out gets hammered down (used to encourage conformity)
切り釘[kirikugi] brad
裏釘[urakugi] nail sticking through

装釘[soutei] binding (book)
釘抜き[kuginuki] pincers
金釘流[kanakugiryuu] a scrawl
ねじ釘[nejikugi] screw