Benedict Arnold, Brutus, Catilinarian, Judas, Judas Iscariot, Quisling, apostate, archtraitor, blab, blabber, blabberer, blabbermouth, cockatrice, complotter, conniver, conspirator, conspirer, convict, criminal, crook, debaucher, deceiver, defiler, delator, deserter, desperado, desperate criminal, despoiler, double agent, double-crosser, double-dealer, false friend, felon, fink, fugitive, gallows bird, gangster, gaolbird, informer, intrigant, intriguer, jailbird, lawbreaker, machinator, mobster, narc, nark, outlaw, peacher, plotter, public enemy, quisling, racketeer, raper, rapist, rat, ravager, ravisher, recreant, renegade, schemer, scofflaw, seducer, serpent, snake, snitch, snitcher, spy, squealer, stool pigeon, stoolie, swindler, talebearer, tattler, tattletale, telltale, thief, thug, timeserver, traitor, treasonist, trimmer, turncoat, two-timer, violator, whistle-blower