accord vs written agreement

accord and written agreement both are nouns.

Word	Noun	Adjective	Verb	Adverb
accord	Yes	No	Yes	No
written agreement	Yes	No	No	No

As nouns, written agreement is a hypernym of accord; that is, written agreement is a word with a broader meaning than accord:

accord: a written agreement between two states or sovereigns
written agreement: a legal document summarizing the agreement between parties

accord (noun)	written agreement (noun)
sympathetic compatibility	a legal document summarizing the agreement between parties
concurrence of opinion
a written agreement between two states or sovereigns
harmony of people's opinions or actions or characters

accord (verb)	written agreement (verb)
allow to have
go together