verify vs substantiate

verify and substantiate both are verbs.

Word	Noun	Adjective	Verb	Adverb
verify	No	No	Yes	No
substantiate	No	No	Yes	No

As verbs, substantiate is a hypernym of verify; that is, substantiate is a word with a broader meaning than verify:

Other hypernyms of verify include affirm, confirm, corroborate, support, sustain.

verify (verb)	substantiate (verb)
confirm the truth of	solidify, firm, or strengthen
to declare or affirm solemnly and formally as true	establish or strengthen as with new evidence or facts
attach or append a legal verification to (a pleading or petition)	make real or concrete; give reality or substance to
check or regulate (a scientific experiment) by conducting a parallel experiment or comparing with another standard	represent in bodily form