English to English

noun (n)

• one who reveals confidential information in return for money(noun.person)

  Synonym:
  blabber, informer, rat, squealer
  

  source: wordnet30
• a person who says one thing and does another(noun.person)

  Synonym:
  double-crosser, double-dealer, traitor, two-timer
  

  source: wordnet30
• One who, or that which, betrays.(noun)

  source: webster1913