consonant vs concordant

consonant is a noun but concordant is not a noun.

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

As adjectives, consonant and concordant are synonyms defined as:

Other synonyms of consonant include accordant, agreeable, conformable.

consonant (noun)	concordant (noun)
a speech sound that is not a vowel
a letter of the alphabet standing for a spoken consonant

consonant (adjective)	concordant (adjective)
in keeping	being of the same opinion
involving or characterized by harmony	in keeping