CORD

not agreeing or going well together; clashing media type="youtube" key="mji82PQTYeo" height="344" width="425" The old woman and the man have discordant relations when he wakes her up in the crosswalk and she decides to reprimand him by hitting his car.
 *  Discordant (adj.)

Concordance (n.) agreement or harmony; unity A sign of concordance is shaking hands. **