10 letters · 13 points in Scrabble
noun a conflict of people's opinions or actions or characters
noun the auditory experience of sound that lacks musical quality; sound that is a disagreeable auditory experience
noun disagreeable sounds
originBorrowed from Middle French dissonance, from Latin dissonantia; by surface analysis, dis- + son- + -ance.
Etymology from Wiktionary, CC BY-SA 3.0