General:
* Falsify: To make something false or inaccurate, especially for the purpose of deception.
* Fabricate: To invent or create something false.
* Counterfeit: To imitate something with the intent to deceive.
* Misrepresent: To present something in a way that is misleading or inaccurate.
* Distort: To twist or change the true meaning of something.
* Pervert: To twist or corrupt something from its original purpose or meaning.
* Disprove: To show that something is false.
* Debunk: To expose the falseness of something.
More specific:
* Forger: To create a fake document or piece of art.
* Lie: To make a false statement with the intent to deceive.
* Spin: To present information in a way that is favorable to a particular point of view, even if it is not entirely accurate.
* Manipulate: To control or influence someone or something in a dishonest or unfair way.
* Propagandize: To spread false or misleading information to promote a particular cause.
* Concoct: To invent or create a story or explanation, often to deceive.
The best word to use will depend on the specific context and the intent of the speaker or writer.