Roget's Thesaurus: Entry 414 (Discord)

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#414. Discord. -- N. discord , discordance; dissonance, cacophony, want of harmony, caterwauling; harshness &c. 410. Babel[Confused sounds]; Dutch concert, cat's concert; marrowbones and cleavers.

V. be discordant &c. adj. .; jar &c. (sound harshly) 410.

Adj. discordant; dissonant, absonant[obs]; out of tune, tuneless; unmusical, untunable[obs]; unmelodious, immelodious[obs]; unharmonious[obs], inharmonious; singsong; cacophonous; harsh &c. 410; jarring.