invalidator vs invalidate

invalidator is a noun but invalidate is not a noun.

Word	Noun	Adjective	Verb	Adverb
invalidator	Yes	No	No	No
invalidate	No	No	Yes	No

invalidator (noun)	invalidate (noun)
an official who can invalidate or nullify

invalidator (verb)	invalidate (verb)
	take away the legal force of or render ineffective
	show to be invalid
	make invalid for use
	declare invalid