鈎虫[kouchuu] hookworm
鈎鼻[kagibana] hooked nose
毛鈎[kebari] (fishing) fly
鈎爪[kagizume] claw

鈎股弦の定理[koukogennoteiri] Pythagorean theorem
鈎股弦[koukogen] three sides of right triangle (minor cathetus, major cathetus & hypotenuse)
引目鈎鼻[hikimekagihana] style of drawing the human face, popular in the Heian period

懸鉤子[kiichigo] raspberry (any plant of genus Rubus, esp. Rubus palmatus var. coptophyllus)
鉤括弧[kagikakko] square bracket
釣鉤[tsuribari] fish hook
鉤針[kagibari] hook

手鉤[tekagi] short gaff
鉤十字[kagijuuji] swastika
鉤の手[kaginote] right-angled bend
鉤虫[kouchuu] hookworm