Yes, concord is a Scrabble word!

Verb

1. Go together

2. Arrange by concord or agreement

3. Arrange the words of a text so as to create a concordance

4. Be in accord; be in agreement

Noun

1. Capital of the state of New Hampshire; located in south central New Hampshire on the Merrimack river

2. 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

3. The determination of grammatical inflection on the basis of word relations

4. Town in eastern Massachusetts near Boston where the first battle of the American Revolution was fought

5. Agreement of opinions

6. The first battle of the American Revolution (April 19, 1775)