nurture vs foster

nurture is a noun but foster is not a noun.

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

As verbs, nurture and foster are synonyms defined as:

As verbs, foster is a hyponym of nurture; that is, foster is a word with a more specific, narrower meaning than nurture:

Other hyponyms of nurture include fledge, cradle.

nurture (noun)	foster (noun)
helping someone grow up to be an accepted member of the community
the properties acquired as a consequence of the way you were treated as a child

nurture (adjective)	foster (adjective)
	providing or receiving nurture or parental care though not related by blood or legal ties

nurture (verb)	foster (verb)
help develop, help grow	help develop, help grow
provide with nourishment	promote the growth of
look after a child until it is an adult	bring up under fosterage; of children