WordNet sense 1 (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):

concordance, harmony

WordNet sense 2 (the determination of grammatical inflection on the basis of word relations):

agreement

WordNet sense 3 (capital of the state of New Hampshire; located in south central New Hampshire on the Merrimack river):

capital of New Hampshire

WordNet sense 4 (go together):

accord, agree, consort, harmonize, harmonise, consort, fit in

WordNet sense 5 (the first battle of the American Revolution (April 19, 1775)):

Lexington, Lexington and Concord

WordNet sense 6 (be in accord; be in agreement):

concur, hold