establish vs corroborate

establish and corroborate both are verbs.

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

As verbs, corroborate is a hypernym of establish; that is, corroborate is a word with a broader meaning than establish:

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

Other hypernyms of establish include affirm, confirm, substantiate, support, sustain.

establish (verb)	corroborate (verb)
establish the validity of something, as by an example, explanation or experiment	establish or strengthen as with new evidence or facts
institute, enact, or establish	give evidence for
use as a basis for; found on	support with evidence or authority or make more certain or confirm
place
set up or lay the groundwork for
bring about
build or establish something abstract
set up or found