fit in vs accord

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

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

As verbs, fit in and accord are synonyms defined as:

Other synonyms of fit in include agree, concord, consort, harmonise, harmonize.

fit in (noun)	accord (noun)
	sympathetic compatibility
	concurrence of opinion
	a written agreement between two states or sovereigns
	harmony of people's opinions or actions or characters

fit in (verb)	accord (verb)
go together	allow to have
	go together