foster vs serve well

foster is an adjective but serve well is not an adjective.

Word	Noun	Adjective	Verb	Adverb
foster	No	Yes	Yes	No
serve well	No	No	Yes	No

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

Other hyponyms of foster include keep going, patronage, patronise, patronize, support, serve.

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

foster (verb)	serve well (verb)
help develop, help grow	promote, benefit, or be useful or beneficial to
promote the growth of
bring up under fosterage; of children