CACOPHONY
cacophony
(noun) loud confusing disagreeable sounds
blare, blaring, cacophony, clamor, din
(noun) a loud harsh or strident noise
Source: WordNet® 3.1
Etymology
Noun
cacophony (countable and uncountable, plural cacophonies)
A mix of discordant sounds; dissonance.
Antonyms
• euphony
• harmony
Source: Wiktionary
Ca*coph"o*ny, n.; pl. Cacophonies. Etym: [Gr. Cacophonie.]
1. (Rhet.)
Definition: An uncouth or disagreable sound of words, owing to the
concurrence of harsh letters or syllables. "Cacophonies of all
kinds." Pope.
2. (Mus.)
Definition: A combination of discordant sounds.
3. (Med.)
Definition: An unhealthy state of the voice.
Source: Webster’s Unabridged Dictionary 1913 Edition