noun (n)

• any evidence that helps to establish the falsity of something(noun.cognition)

  Synonym:
  disproof, refutation
  

  source: wordnet30
• a willful perversion of facts(noun.act)

  Synonym:
  misrepresentation
  

  source: wordnet30
• the act of rendering something false as by fraudulent changes (of documents or measures etc.) or counterfeiting(noun.act)

  Synonym:
  falsehood
  

  source: wordnet30
• the act of determining that something is false(noun.act)

  Synonym:
  disproof, falsifying, refutal, refutation
  

  source: wordnet30
• The act of falsifying, or making false; a counterfeiting; the giving to a thing an appearance of something which it is not.(noun)

  source: webster1913