concord vs agree

concord is a noun but agree is not a noun.

Word	Noun	Adjective	Verb	Adverb
concord	Yes	No	Yes	No
agree	No	No	Yes	No

As verbs, concord and agree are synonyms defined as:

Other synonyms of concord include concur, hold.

As verbs, concord and agree are synonyms defined as:

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

As verbs, agree is a hypernym of concord; that is, agree is a word with a broader meaning than concord:

concord: go together
agree: be compatible, similar or consistent; coincide in their characteristics

Other hypernyms of concord include check, correspond, fit, gibe, jibe, match, tally.

concord (noun)	agree (noun)
agreement of opinions
the determination of grammatical inflection on the basis of word relations
a harmonious state of things in general and of their properties (as of colors and sounds); congruity of parts with one another and with the whole

concord (verb)	agree (verb)
be in accord; be in agreement	be in accord; be in agreement
arrange the words of a text so as to create a concordance	consent or assent to a condition, or agree to do something
arrange by concord or agreement	achieve harmony of opinion, feeling, or purpose
go together	be agreeable or suitable
	be compatible, similar or consistent; coincide in their characteristics
	go together
	show grammatical agreement