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Noun: betrayer
  1. One who reveals confidential information to the police or other authority
    - informer, rat, squealer, blabber
     
  2. A person who says one thing and does another
    - double-crosser, double-dealer, two-timer, traitor

Derived forms: betrayers

See also: betray

Type of: beguiler, cheat, cheater, deceiver, informant, slicker, source, trickster

Encyclopedia: Betrayer