snake

crawl, creep, inch, worm

pad, tiptoe

crouch, squat

edge, inch, nose

skulk, sneak, steal, tiptoe

adder, anaconda, asp, blacksnake, boa, bull snake, bushmaster, cobra, constrictor, copperhead, coral snake, cottonmouth moccasin, diamondback rattlesnake, fer-de-lance, garter snake, gopher snake, green snake, hognose snake, indigo snake, king cobra, king snake, krait, mamba, milk snake, moccasin, pit viper, puff adder, python, racer, rat snake, rattlesnake, sea serpent, sidewinder, water moccasin, water snake

barbarian, brute, caveman, Neanderthal, savage

loudmouth, vulgarian

lowlife, miscreant, rascal, rogue, roughneck, scab, scamp, scoundrel, villain, wretch

booby, fool, nincompoop, ninny, nitwit, nut

airhead, birdbrain, blockhead, dolt, dope, dork [slang], goon, half-wit, idiot, imbecile, moron, turkey

collaborationist, collaborator, subversive, subverter

coconspirator, conspirator, intriguer, plotter, schemer

defector, deserter, renegade

informant, informer, rat, snitch, snitcher, squealer, stool pigeon, talebearer, tattler, tattletale