verify vs sustain

verify and sustain both are verbs.

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

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

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

verify (verb)	sustain (verb)
confirm the truth of	undergo (as of injuries and illnesses)
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)	admit as valid
check or regulate (a scientific experiment) by conducting a parallel experiment or comparing with another standard	supply with necessities and support
	provide with nourishment
	be the physical support of; carry the weight of
	lengthen or extend in duration or space