Open English Wordnet
Adjectives
(a)antagonisticarousing animosity or hostility“his antagonistic brusqueness”, “Europe was antagonistic to the Unites States”
(a)antagonistic, incompatibleused especially of drugs or muscles that counteract or neutralize each other's effect
(s)antagonistic, antipathetic, antipatheticalcharacterized by antagonism or antipathy“slaves antagonistic to their masters”, “antipathetic factions within the party”