keel

aircraft carrier, argosy, barge, coaster, collier, containership, corvette, cruiser, cutter, destroyer, ferryboat, flagship, freighter, icebreaker, ironclad, lightship, liner, man-of-war (also man-o'-war), merchantman, merchant ship, motor ship, packet, steamer, steamship, superliner, supertanker, tanker, trader, tramp, transport, warship, watercraft

bark (or barque), brig, brigantine, caravel, clipper, junk, ketch, sailboat, schooner, square-rigger, tall ship, windjammer, xebec, yacht