hammerhead, hammerhead shark
['shovel', 'amphibian, amphibious vehicle', 'sidewinder, horned rattlesnake, Crotalus cerastes', 'maillot, tank suit', 'breakwater, groin, groyne, mole, bulwark, seawall, jetty', 'water buffalo, water ox, Asiatic buffalo, Bubalus bubalis', 'mongoose']