underpin vs corroborate

underpin and corroborate both are verbs.

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

As verbs, underpin and corroborate are synonyms defined as:

underpin and corroborate: support with evidence or authority or make more certain or confirm

Other synonyms of underpin include bear out, support.

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