corroborate vs show

corroborate is not a noun while show is a noun.

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

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

corroborate: establish or strengthen as with new evidence or facts
show: establish the validity of something, as by an example, explanation or experiment

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

corroborate (noun)	show (noun)
	an act or social event involving a public performance or entertainment
	pretending that something is the case in order to make a good impression
	something intended to communicate a particular impression

corroborate (verb)	show (verb)
establish or strengthen as with new evidence or facts	establish the validity of something, as by an example, explanation or experiment
give evidence for	provide evidence for
support with evidence or authority or make more certain or confirm	indicate a place, direction, person, or thing; either spatially or figuratively
	give expression to
	give evidence of, as of records
	indicate a certain reading; of gauges and instruments
	finish third or better in a horse or dog race
	show in, or as in, a picture
	take (someone) to their seats, as in theaters or auditoriums
	make visible or noticeable
	be or become visible or noticeable
	give an exhibition of to an interested audience