Benedict Arnold, Brutus, Judas, Judas Iscariot, Quisling, archtraitor, blab, blabber, blabberer, blabbermouth, cockatrice, conniver, conspirator, conspirer, convict, criminal, crook, debaucher, deceiver, defiler, delator, desperado, desperate criminal, despoiler, double agent, double-crosser, double-dealer, 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, 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