verify vs ensure

verify and ensure both are verbs.

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

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

verify (verb)	ensure (verb)
confirm the truth of	be careful or certain to do something; make certain of something
to declare or affirm solemnly and formally as true	make certain of
attach or append a legal verification to (a pleading or petition)
check or regulate (a scientific experiment) by conducting a parallel experiment or comparing with another standard