bathing cap(n = noun.artifact) swimming cap - a tight-fitting cap that keeps hair dry while swimming;
is a kind of cap

baseball cap, bathing, bathing beauty, bathing costume, bathing machine, bathing suit, bathing trunks, bathing tub, bishop's cap, blasting cap, cap, cap off, cap opener, cap screw, cervical cap, cloth cap, coonskin cap, cradle cap, death cap, distributor cap, dunce cap, dunce's cap, five-point bishop's cap, flat cap, fool's cap, garrison cap, golf cap, ice cap, inky cap, jockey cap, large cap, lens cap, liberty cap, overseas cap, peaked cap, percussion cap, phrygian cap, radiator cap, root cap, sailor cap, sea bathing, service cap, shaggy cap, shower cap, ski cap, small cap, stocking cap, sun bathing, swimming cap, thinking cap, toboggan cap, watch cap, wishing cap, yachting cap