breakwater, groin, groyne, mole, bulwark, seawall, jetty
['spiny lobster, langouste, rock lobster, crawfish, crayfish, sea crawfish', 'amphibian, amphibious vehicle', 'clog, geta, patten, sabot', 'cuirass', 'brain coral', 'paddlewheel, paddle wheel', 'hatchet']