Synonyms and related words :
antagonism, antipathy, antithesis, bearishness, bitchiness, cantankerousness, churlishness, clashing, collision, conflict, confrontation, contradiction, contradistinction, contraindication, contraposition, contrariety, contrariness, contrast, counterposition, crabbedness, crankiness, cross-purposes, crossness, crustiness, cussedness, difficultness, disagreeability, disagreement, discrepancy, dourness, excitability, fractiousness, frowardness, hostility, huffiness, huffishness, inconsistency, inimicalness, irascibility, irritability, meanness, oppositeness, opposition, opposure, oppugnance, oppugnancy, orneriness, perverseness, perversite, polarity, repugnance, showdown, snappishness, stuffiness, sulkiness, sullenness, testiness, ugliness, waspishness, waywardness, wrongheadedness