verify vs mark off

verify and mark off both are verbs.

Word	Noun	Adjective	Verb	Adverb
verify	No	No	Yes	No
mark off	No	No	Yes	No

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

Other hyponyms of verify include check, check off, mark, tick, tick off, ascertain, assure, check, control, ensure, insure, see, see to it, check.

verify (verb)	mark off (verb)
confirm the truth of	set boundaries to and delimit
to declare or affirm solemnly and formally as true	put a check mark on or near or next to
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