hammerhead, hammerhead shark
["loupe, jeweler's loupe", 'cleaver, meat cleaver, chopper', 'hammer', "plane, carpenter's plane, woodworking plane", 'Gila monster, Heloderma suspectum', 'goldfish, Carassius auratus', 'breakwater, groin, groyne, mole, bulwark, seawall, jetty']