adherent vs adhere

adherent is a noun but adhere is not a noun.

Word	Noun	Adjective	Verb	Adverb
adherent	Yes	Yes	No	No
adhere	No	No	Yes	No

adherent (noun)	adhere (noun)
someone who believes and helps to spread the doctrine of another

adherent (adjective)	adhere (adjective)
sticking fast

adherent (verb)	adhere (verb)
	follow through or carry out a plan without deviation
	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