adoptive vs foster

adoptive and foster both are adjectives.

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

adoptive (adjective)	foster (adjective)
of parents and children; related by adoption	providing or receiving nurture or parental care though not related by blood or legal ties
acquired as your own by free choice

adoptive (verb)	foster (verb)
	help develop, help grow
	promote the growth of
	bring up under fosterage; of children