falsification vs falsifying

falsification and falsifying both are nouns.

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

As nouns, falsification and falsifying are synonyms defined as:

falsification and falsifying: the act of determining that something is false

Other synonyms of falsification include disproof, refutal, refutation.

falsification (noun)	falsifying (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
the act of determining that something is false
a willful perversion of facts
any evidence that helps to establish the falsity of something