disharmony (n.)

• antagonism
• argumentation
• atonalism
• atonality
• cacophony
• clash
• clinker
• conflict
• contention
• contradiction
• controversy
• derangement
• difference
• disagreement
• disarrangement
• disarray
• discomfiture
• discomposure
• discord
• discordance
• discrepancy
• disintegration
• disjunction
• disorder
• disorderliness
• disorganization
• disparity
• disproportion
• disruption
• dissension
• dissent
• dissidence
• dissonance
• disturbance
• disunion
• disunity
• divergence
• diversity
• enmity
• entropy
• faction
• flatness
• friction
• haphazardness
• incoherence
• incompatibility
• inequality
• inharmoniousness
• irregularity
• jangle
• jar
• mischief
• negation
• nonuniformity
• opposition
• perturbation
• promiscuity
• promiscuousness
• randomness
• repugnance
• rub
• sharpness
• sourness
• stridor
• strife
• tension
• turbulence
• unpleasantness
• upset
• variance
• wolf