adoptive vs adopt

adoptive is an adjective but adopt is not an adjective.

Word	Noun	Adjective	Verb	Adverb
adoptive	No	Yes	No	No
adopt	No	No	Yes	No

adoptive (adjective)	adopt (adjective)
of parents and children; related by adoption
acquired as your own by free choice

adoptive (verb)	adopt (verb)
	take into one's family
	take on a certain form, attribute, or aspect
	take up the cause, ideology, practice, method, of someone and use it as one's own
	put into dramatic form
	take up and practice as one's own
	choose and follow; as of theories, ideas, policies, strategies or plans
	take on titles, offices, duties, responsibilities