Milquetoast, abulic, afraid, amphibian, aquatic, baby, big baby, biped, canine, cannibal, carnivore, chicken, chicken liver, cosmopolite, coward, cowardly, crustacean, crustaceous, crybaby, disorganized, doormat, dull tool, emasculate, faint, fainthearted, feeble, feebleminded, feline, forceless, fraid-cat, fraidy-cat, frail, funk, funker, gnawer, gutless wonder, herbivore, impotent, inadequate, ineffective, ineffectual, infirm, insectivore, jellyfish, lightweight, lily liver, mammal, mammalian, marsupial, marsupialian, meek soul, milksop, molluscan, mollycoddle, mouse, namby-pamby, nebbish, nonentity, omnivore, pansy, pantywaist, pliable, primate, protozoan, protozoic, pushover, quadruped, reptile, rodent, ruminant, sad sack, scaredy-cat, scavenger, sissy, softling, softy, sop, spineless, ungulate, varmint, vermin, vertebrate, weak, weak sister, weak-kneed, weak-minded, weak-willed, weakling, white feather, white liver