verification vs verify

verification is a noun but verify is not a noun.

Word	Noun	Adjective	Verb	Adverb
verification	Yes	No	No	No
verify	No	No	Yes	No

verification (noun)	verify (noun)
additional proof that something that was believed (some fact or hypothesis or theory) is correct
(law) an affidavit attached to a statement confirming the truth of that statement

verification (verb)	verify (verb)
	confirm the truth of
	to declare or affirm solemnly and formally as true
	attach or append a legal verification to (a pleading or petition)
	check or regulate (a scientific experiment) by conducting a parallel experiment or comparing with another standard