beaver
['American alligator, Alligator mississipiensis', 'nematode, nematode worm, roundworm', 'worm fence, snake fence, snake-rail fence, Virginia fence', 'harmonica, mouth organ, harp, mouth harp', 'hippopotamus, hippo, river horse, Hippopotamus amphibius', 'lakeside, lakeshore', 'goose']