noun (n)

• a false accusation of an offense or a malicious misrepresentation of someone's words or actions(noun.communication)

  Synonym:
  calumniation, defamation, hatchet job, obloquy, traducement
  

  source: wordnet30
• an abusive attack on a person's character or good name(noun.act)

  Synonym:
  aspersion, defamation, denigration, slander
  

  source: wordnet30
• False accusation of a crime or offense, maliciously made or reported, to the injury of another; malicious misrepresentation; slander; detraction.(noun)

  source: webster1913