[n] disagreeable sounds
[n] the auditory experience of sound that lacks musical quality; sound that is a disagreeable auditory experience; "modern music is just noise to me"
[n] a conflict of people's opinions or actions or characters
disagreement - (4 syllables), dissension - (3 syllables), noise - (1 syllables), racket - (2 syllables)
\Dis"so*nance\, n. [L. dissonantia: cf. F. dissonance.]
1. A mingling of discordant sounds; an inharmonious combination of sounds; discord. Filled the air with barbarous dissonance. --Milton.
2. Want of agreement; incongruity. --Milton.