corroborate vs corroboration

corroborate is not a noun while corroboration is a noun.

Word	Noun	Adjective	Verb	Adverb
corroborate	No	No	Yes	No
corroboration	Yes	No	No	No

corroborate (noun)	corroboration (noun)
	confirmation that some fact or statement is true through the use of documentary evidence

corroborate (verb)	corroboration (verb)
establish or strengthen as with new evidence or facts
give evidence for
support with evidence or authority or make more certain or confirm