Synonyms and related words :
amphibian, aquatic, biped, biquadratic, canine, cannibal, carnivore, cosmopolite, feline, four, four-legged, four-rayed, foursquare, gnawer, herbivore, insectivore, invertebrate, mammal, mammalian, marsupial, marsupialian, omnivore, primate, quadric, quadrilateral, quadrinomial, quadrivalent, quartic, quartile, quaternary, reptile, rodent, ruminant, scavenger, tetractinal, tetrad, tetravalent, ungulate, varmint, vermin, vertebrate