falsification

(noun) any evidence that helps to establish the falsity of something. Synonyms: disproof, refutation.

(noun) a willful perversion of facts. Synonyms: misrepresentation.

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

(noun) the act of determining that something is false. Synonyms: falsifying, disproof, refutation, refutal.