Synonyms of antagonisms

2 Syllables
clashing, conflict, discord, hatred, friction, rancor
3 Syllables
enmity, rivalry, contention, dissension, animus
4 Syllables
oppugnancy, antithesis, incongruity, hostility, antipathy, resistance, disagreement, difference, contrariety, competition
5 Syllables
animosity, contradistinction