刀 - sword, saber, knife

long sword (as opposed to the shorter katana)

short sword; knife; dagger; dirk; tantō

Japanese sword (usu. single-edged and curved); Japanese bladed weapon

sword (esp. Japanese single-edged); katana

sword; dagger; knife; bayonet

razor

bamboo sword (for kendo); bamboo fencing stick

(Japanese) long sword; large sword

(small) knife

outer edge of the foot (from little toe to heel) (karate)

one's last resort; trump card

snake mackerel (Gempylus serpens)