agreement vs accordance

agreement and accordance both are nouns.

Word	Noun	Adjective	Verb	Adverb
agreement	Yes	No	No	No
accordance	Yes	No	No	No

As nouns, accordance is a hyponym of agreement; that is, accordance is a word with a more specific, narrower meaning than agreement:

agreement (noun)	accordance (noun)
compatibility of observations	the act of granting rights
the thing arranged or agreed to	concurrence of opinion
the verbal act of agreeing
the statement (oral or written) of an exchange of promises
the determination of grammatical inflection on the basis of word relations
harmony of people's opinions or actions or characters