corroborate vs vouch

corroborate and vouch both are verbs.

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

As verbs, vouch is a hyponym of corroborate; that is, vouch is a word with a more specific, narrower meaning than corroborate:

Other hyponyms of corroborate include back, back up, verify, demonstrate, establish, prove, shew, show, document, validate.

corroborate (verb)	vouch (verb)
establish or strengthen as with new evidence or facts	give supporting evidence
give evidence for	summon (a vouchee) into court to warrant or defend a title
support with evidence or authority or make more certain or confirm	give personal assurance; guarantee
	give surety or assume responsibility