1. (n.) One of the shells or valves of a cockle.

2. (n.) A light boat.

almadia argosy ark auto autocar automobile auxiliary barge bark bottom bucket buggy bus buss canoe car cargo boat carry sail cart cat catamaran circumnavigate coach coast cockle cockleshell cog coracle craft crate cross cruise cruiser cutter dinghy dispatch boat dray drifter dugout ferry ferryboat fishing boat float funny galley gig glider go by ship go on shipboard go to sea gondola haul heap hooker houseboat hoy hulk hull hydrofoil hydroplane jalopy jolly jolly boat kayak keel knockabout launch leviathan lifeboat lighter longboat machine mailer make a passage motor motor vehicle motorboat motorcar motorized vehicle navigate outboard outrigger canoe packet pilot pilot boat pinnace piragua pirogue ply pontoon post boat pram punt racer racing shell raft randan row rowboat rowing boat run runabout sail sail round sail the sea sailboat sampan scooter scow scull seafare shallop shell ship showboat skiff sled sledge small boat sneakbox speedboat steam steamboat surfboat take a voyage towboat traverse trawlboat trawler trimaran trow truck tub tug tugboat van vessel voiture voyage wagon wanigan watercraft whale-gig whaleboat wheelbarrow wheels wherry wreck yacht yawl yawl boat