Synonyms of double-dealer

nounOne who double deals; a cheat or crook.

• backstabberA traitor or hypocrite, such as a co-worker or friend assumed trustworthy but who figuratively attacks when one's back...
• double-crosserOne who double-crosses; a traitor.
• traitor
• betrayerSomeone who betrays, or reveals confidential information; a squealer or informer.
• quislingA traitor who collaborates with the enemy.
• rat
• ratter
• recreantSomebody who is recreant, who yields in combat; a coward or traitor.
• renegade
• serpent
• snake
• snake in the grassA hidden enemy.
• treasonistOne who commits treason.
• wolf in sheep's clothingSomeone who or something which is harmful or threatening but disguised as something peaceful or pleasant.
• cockatrice archaic
• swike dialectal, obsolete
• treacher archaicA traitor or deceiver.
• treacherer archaicA treacher, a traitor.
• turntippet obsoleteA traitor; a defector; a renegade.
• withersake archaicAn apostate or perfidious renegade.