Concord (noun)

1. Agreement or harmony between people or groups.
2. An official agreement or treaty.
3. A state in which different elements are in agreement or harmony.
4. A musical chord that is pleasing to the ear.

Origin:

From old french concorde, from latin concordia, from concors, agreeing, harmonious.

Examples:

1. The workers and management reached a concord after a long negotiation.
2. The Concord Treaty was signed by the leaders of the two countries to end the war.
3. The new design had a concord of colors and patterns that were pleasing to the eye.
4. The pianist played a concord of notes that created a beautiful melody.
5. The different political parties showed a rare concord on the issue of the new law.