adopt vs adoptive

adopt is not an adjective while adoptive is an adjective.

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

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

adopt (verb)	adoptive (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