ascertain vs verify

ascertain and verify both are verbs.

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

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

ascertain (verb)	verify (verb)
be careful or certain to do something; make certain of something	confirm the truth of
learn or discover with certainty	to declare or affirm solemnly and formally as true
find out, learn, or determine with certainty, usually by making an inquiry or other effort	attach or append a legal verification to (a pleading or petition)
establish after a calculation, investigation, experiment, survey, or study	check or regulate (a scientific experiment) by conducting a parallel experiment or comparing with another standard