Benedict Arnold Brutus Judas Judas Iscariot Judas-like Quisling Trojan-horse apostate archtraitor backslider betrayer betraying bolter cockatrice collaborationist collaborator conniver conspirator conspirer convert convict criminal crook deceiver defector deserter desperado desperate criminal double agent double-crosser double-crossing double-dealer felon fifth columnist fifth-column fugitive gallows bird gangster gaolbird informer intrigant intriguer jailbird lawbreaker machinator mobster mugwump outlaw plotter proselyte public enemy quislingistic racketeer rat recidivist recreant renegade renegado renegate reversionist runagate schemer schismatic scofflaw seceder secessionist separatist serpent snake strikebreaker swindler tergiversant tergiversator thief thug timeserver traitor traitorous treasonable treasonist treasonous trimmer turnabout turncoat turntail two-timer two-timing