dissonance

ˈdɪs(ə)nəns

noun

lack of harmony among musical notes.

an unusual degree of dissonance for such choral styles

inharmoniousness,discordance,atonality,cacophony,harshness,stridency,grating,jarring

SYNONYMS

atonalitycacophonydiscordancegratingharshnessinharmoniousnessjarringstridency