concordant vs accordant

concordant and accordant both are adjectives.

Word	Noun	Adjective	Verb	Adverb
concordant	No	Yes	No	No
accordant	No	Yes	No	No

As adjectives, concordant and accordant are synonyms defined as:

Other synonyms of concordant include agreeable, conformable, consonant.

concordant (adjective)	accordant (adjective)
being of the same opinion	being in agreement or harmony; often followed by `with'
in keeping	in keeping