Open English Wordnet
Adjectives
(a)antagonistic, incompatibleused especially of drugs or muscles that counteract or neutralize each other's effect
(a)uncongenial, incompatiblenot suitable to your tastes or needs“the uncongenial roommates were always fighting”, “the task was uncongenial to one sensitive to rebuffs”
(a)incompatibleincapable of being used with or connected to other devices or components without modification
(s)contrastive, incompatibleof words so related that one contrasts with the other“`rich' and `hard-up' are contrastive terms”
(s)inappropriate, incompatible, out of keeping, unfittingnot in keeping with what is correct or proper“completely inappropriate behavior”
(s)incompatibleused especially of solids or solutions; incapable of blending into a stable homogeneous mixture