6 letters · 6 points in Scrabble
noun corresponding exactly
noun occurring together or simultaneously
noun (music) two or more sounds or tones at the same pitch or in octaves
originFrom Middle English unisoun, from Middle French unisson, from Medieval Latin ūnisonus (“having the same sound”), from ūni- + sonus (“sound”).
Etymology from Wiktionary, CC BY-SA 3.0