breakwater, groin, groyne, mole, bulwark, seawall, jetty
['amphibian, amphibious vehicle', 'trilobite', 'maze, labyrinth', 'shield, buckler', 'American lobster, Northern lobster, Maine lobster, Homarus americanus', 'breastplate, aegis, egis', 'coho, cohoe, coho salmon, blue jack, silver salmon, Oncorhynchus kisutch']