Synonyms for Inharmonious (same or very similar meaning)
WordNet sense 1 (characterized by musical dissonance; harmonically unresolved):
dissonantWordNet sense 2 (lacking in harmony):
discordant, disharmonious, inharmonicWordNet sense 3 (not in harmony):
unharmoniousWordNet sense 4 (lacking in harmony or compatibility or appropriateness):
incongruousFrom the ODE community, based on WordNetadd/edit