informant, supergrass, drug peddler, extortionist, undercover agent, agent provocateur, accomplice, smuggler, conspirator, druglord, drug trafficker, snitch, defector, assassin, blackmailer, gangster, stool pigeon, underworld, narc, policeman, mobster, racketeer, sympathizer, spies, absconder, prostitute, trafficker, infiltrator, alias, hideout, mukhabarat, mafioso, betrayer, interrogator, kidnapper, henchman, approver, armourer, bodyguard, hitmen, turncoat, gunrunner, stoolie, mafia, brigand, hitman, traitor, mole, ringleader, tipster, detective, bookie, taximan, drug lord, gangland, escaper, thug, kim philby, peddler, conman, askari, wiretapper, journalist, dacoit, constable, murderer, cooperator, policewoman, abductors, grenade thrower, maulana, sicilian mafia, charas, saboteur, martyr, underboss, drug addict, surrenderee, bagman, raad, huji, operatives, spymaster, loanshark, supari, cop, inla, warder, alphonse capone, interrogation, acquaintance, soviet kgb, confession, forger, eyewitness, courier, housebreaker, functionary, killers, executioner, nark, loyalist, informers, spy, collaborator, helper, collaborators, accuser, correspondent, referee, messenger, thief, conspirators, interlocutor, sorcerer, assassins, broadcaster, earlier, immemorial, ive, saturnian, sequent, after, barbarous, bygone, calendric, childrearing, chivalric, connect, diluvian, disturbed, earlieft, earliest, ent, evaluated, feudal, formative

canary, copper's nark, fink, sneak, stoolpigeon

canary, copper's nark, fink, inform, informer's privilege, liquidate, nark, sneak, sneaker, snitch, snitcher, stoolie, stoolpigeon, supergrass

source

rat, squealer