antagonism, argumentation, atonalism, atonality, cacophony, clashing, clinker, conflict, contention, contradiction, contrariety, contrast, controversy, departure, deviation, difference, disaccord, disaccordance, disagreement, disconformity, discongruity, discord, discordance, discordancy, discrepancy, discreteness, disharmony, disparity, dissension, dissent, dissidence, dissimilarity, dissonancy, dissonant chord, distinction, distinctness, disunion, disunity, divergence, divergency, diversity, faction, far cry, flatness, heterogeneity, inaccordance, incompatibility, incongruity, inconsistency, inconsonance, inequality, inharmoniousness, inharmony, irreconcilability, jarring, mixture, negation, nonconformity, odds, off note, opposition, oppugnancy, otherness, repugnance, separateness, sharpness, sour note, sourness, stridor, strife, tunelessness, unconformity, unharmoniousness, unlikeness, unmusicality, unorthodoxy, untunefulness, variance, variation, variegation, variety, wolf