Referring to characteristics of the animal kingdom

animalistic, bestial, beastly, swinish, brutish, wild, beastlike, feral, untamed, instinctual, zoological.

Terms referring to specific animals include: vertebrate, invertebrate, mammalian, ruminant, ungulate, bovine, canine, equine, feline, leonine, lupine, vulpine, ursine, porcine, caprine, ovine, pachydermal, lagomorphic, rodent, marsupial, piscatorial, crustacean, cetacean, amphibian, avian, serpentine, ophidian, reptilian.

Referring to the bodily characteristics of humans

corporeal, physical, bodily, muscular, fleshly, sensual, carnal, earthy, earthly, natural; see also sensual 2. See syn. study at sensual.

Antonyms spiritual*, intellectual*, supernatural.

A mobile organism

living thing, creature, human being, primate, mammal, beast, being, vertebrate, invertebrate, quadruped, biped, carnivore, herbivore, insectivore, scavenger, omnivore, a representative of the fauna.

A nonhuman creature

creature, beast, beast of burden, brute, domestic animal, wild animal, lower animal, quadruped, beast of the field, creeping thing, varmint, pet, farm animal, dumb animal, wild thing, one of God's creatures, monster, critter*.

A brutish human

brute, savage, monster; see beast 2.