corroboration vs corroborate

corroboration is a noun but corroborate is not a noun.

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

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

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