falsify vs falsification

falsify is not a noun while falsification is a noun.

Word	Noun	Adjective	Verb	Adverb
falsify	No	No	Yes	No
falsification	Yes	No	No	No

falsify (noun)	falsification (noun)
	the act of rendering something false as by fraudulent changes (of documents or measures etc.) or counterfeiting
	the act of determining that something is false
	a willful perversion of facts
	any evidence that helps to establish the falsity of something

falsify (verb)	falsification (verb)
falsify knowingly
insert words into texts, often falsifying it thereby
prove false
make false by mutilation or addition; as of a message or story
tamper, with the purpose of deception