follow up vs adhere

follow up and adhere both are verbs.

Word	Noun	Adjective	Verb	Adverb
follow up	No	No	Yes	No
adhere	No	No	Yes	No

As verbs, adhere is a hyponym of follow up; that is, adhere is a word with a more specific, narrower meaning than follow up:

follow up (verb)	adhere (verb)
pursue to a conclusion or bring to a successful issue	follow through or carry out a plan without deviation
increase the effectiveness or success of by further action	stick to firmly
	come or be in close contact with; stick or hold together and resist separation
	be compatible or in accordance with
	be loyal to
	be a devoted follower or supporter