fit in vs coordinate

fit in is not a noun while coordinate is a noun.

Word	Noun	Adjective	Verb	Adverb
fit in	No	No	Yes	No
coordinate	Yes	Yes	Yes	No

As verbs, coordinate is a hyponym of fit in; that is, coordinate is a word with a more specific, narrower meaning than fit in:

Other hyponyms of fit in include blend, blend in, go.

fit in (noun)	coordinate (noun)
	a number that identifies a position relative to an axis

fit in (adjective)	coordinate (adjective)
	of equal importance, rank, or degree

fit in (verb)	coordinate (verb)
go together	bring order and organization to
	bring (components or parts) into proper or desirable coordination correlation
	bring into common action, movement, or condition
	be co-ordinated