breakwater, groin, groyne, mole, bulwark, seawall, jetty
['hammer', 'loudspeaker, speaker, speaker unit, loudspeaker system, speaker system', 'padlock', 'killer whale, killer, orca, grampus, sea wolf, Orcinus orca', 'hip, rose hip, rosehip', 'washer, automatic washer, washing machine', 'doormat, welcome mat']