tusker
['ear, spike, capitulum', 'echidna, spiny anteater, anteater', 'siamang, Hylobates syndactylus, Symphalangus syndactylus', 'hammerhead, hammerhead shark', 'promontory, headland, head, foreland', 'American alligator, Alligator mississipiensis', 'ice bear, polar bear, Ursus Maritimus, Thalarctos maritimus']