refutal vs falsifying

refutal and falsifying both are nouns.

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

As nouns, refutal and falsifying are synonyms defined as:

Other synonyms of refutal include disproof, falsification, refutation.

refutal (noun)	falsifying (noun)
the act of determining that something is false	the act of determining that something is false