Dissonance
Dissonance has several meanings, all related to conflict or incongruity.
In music, dissonance is a property of an interval or chord. See consonance and dissonance.
In poetry, dissonance is the deliberate avoidance of patterns of repeated vowel sounds (see assonance).
Cognitive dissonance is a state of mental conflict.
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See also: Dissonance, Assonance, Chord (music), Cognitive dissonance, Consonance and dissonance, Interval (music), Music, Poetry