child care vs childcare

child care and childcare both are nouns.

Word	Noun	Adjective	Verb	Adverb
child care	Yes	No	No	No
childcare	Yes	No	No	No

As nouns, child care and childcare are synonyms defined as:

child care and childcare: a service involving care for other people's children

child care (noun)	childcare (noun)
a service involving care for other people's children	a service involving care for other people's children