inharmonious or harsh sound; discord; cacophony.

Music .

a simultaneous combination of tones conventionally accepted as being in a state of unrest and needing completion.

an unresolved, discordant chord or interval. Compare consonance ( def. 3 ) .

disagreement or incongruity.

noun

agreement , concord , harmony , accord , consonance , peacefulness , resonance

noun

antagonism , conflict , contention , controversy , difference , disaccord , discord , discrepancy , disharmony , disparity , dissension , dissidence , incongruity , inconsistency , strife , variance , cacophony , harshness , jangle , jarring , unmelodiousness , clash , confrontation , difficulty , discordance , dissent , dissentience , faction , friction , inharmony , schism , war , warfare , disagreement , noise