breakwater, groin, groyne, mole, bulwark, seawall, jetty
['sea snake', 'tow truck, tow car, wrecker', 'chiton, coat-of-mail shell, sea cradle, polyplacophore', 'trolleybus, trolley coach, trackless trolley', 'beacon, lighthouse, beacon light, pharos', 'ashcan, trash can, garbage can, wastebin, ash bin, ash-bin, ashbin, dustbin, trash barrel, trash bin', 'hook, claw']