shower cap(n = noun.artifact) - a tight cap worn to keep hair dry while showering;
is a kind of cap
baseball cap, bathing cap, 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, golden shower tree, golf cap, ice cap, inky cap, jockey cap, large cap, lens cap, liberty cap, meteor shower, overseas cap, peaked cap, percussion cap, phrygian cap, pink shower, pink shower tree, radiator cap, rain shower, rainbow shower, root cap, sailor cap, service cap, shaggy cap, shower, shower bath, shower curtain, shower down, shower room, shower stall, ski cap, small cap, stocking cap, swimming cap, thinking cap, toboggan cap, watch cap, wishing cap, yachting cap