一角

(1) corner/section/point/part/ (2) one horn/ (3) narwhal (Monodon monoceros)

隅

corner/nook/recess

アングル

angle

角度

角

(1) angle/ (2) square (or cube) / (3)(shogi) bishop/ (4) third degree (of the Japanese & Chinese pentatonic scale) / (5)(astron) Chinese horn constellation (one of the 28 mansions) / (6) jiao (monetary unit of China; one-tenth of a yuan)