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Synonyms for Unbalanced (same or very similar meaning)

WordNet sense 1 (affected with madness or insanity):
crazy, demented, distracted, disturbed, mad, sick, unhinged, brainsick

WordNet sense 2 (afflicted with or characteristic of mental derangement):

WordNet sense 3 (being or thrown out of equilibrium):

WordNet sense 4 (poorly balanced or matched in quantity or value or measure):

From the ODE community, based on WordNetadd/edit