refute vs refutation

refute is not a noun while refutation is a noun.

Word	Noun	Adjective	Verb	Adverb
refute	No	No	Yes	No
refutation	Yes	No	No	No

refute (noun)	refutation (noun)
	the act of determining that something is false
	any evidence that helps to establish the falsity of something
	the speech act of answering an attack on your assertions

refute (verb)	refutation (verb)
prove to be false or incorrect
overthrow by argument, evidence, or proof