repudiation vs repudiate

repudiation is a noun but repudiate is not a noun.

Word	Noun	Adjective	Verb	Adverb
repudiation	Yes	No	No	No
repudiate	No	No	Yes	No

repudiation (noun)	repudiate (noun)
the exposure of falseness or pretensions
rejecting or disowning or disclaiming as invalid
refusal to acknowledge or pay a debt or honor a contract (especially by public authorities)

repudiation (verb)	repudiate (verb)
	refuse to acknowledge, ratify, or recognize as valid
	cast off
	reject as untrue, unfounded, or unjust
	refuse to recognize or pay