disproof vs refutal

disproof and refutal both are nouns.

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

As nouns, disproof and refutal are synonyms defined as:

Other synonyms of disproof include falsification, falsifying, refutation.

disproof (noun)	refutal (noun)
the act of determining that something is false	the act of determining that something is false
any evidence that helps to establish the falsity of something