Synonyms of antithetic

1 Syllable
con
2 Syllables
agin, anti, against, counter, polar
3 Syllables
negating, adverse, discrepant, contrary, incongruous, converse, nullifying, opposing, conflicting, reverse, repugnant, mismated, diametric, ornery, different
4 Syllables
contradistinct, antipodal, antipodean, opposite, inconsistent
5 Syllables
antithetical, incompatible, paradoxical, counteractive, contradictory
6 Syllables
irreconcilable, contradistinctive