S: (adj) antagonistic, antipathetic, antipathetical (characterized by antagonism or antipathy) "slaves antagonistic to their masters"; "antipathetic factions within the party"
S: (adj) antagonistic (arousing animosity or hostility) "his antagonistic brusqueness"; "Europe was antagonistic to the Unites States"
S: (adj) antagonistic, incompatible (used especially of drugs or muscles that counteract or neutralize each other's effect)
S: (adj) antagonistic (incapable of harmonious association)
W: (adj) compatible [Indirect via incompatible] (able to exist and perform in harmonious or agreeable combination) "a compatible married couple"; "her deeds were compatible with her ideology"