| adjective | not compatible “incompatible personalities” |
| adjective | used especially of drugs or muscles that counteract or neutralize each other's effect |
| adjective | not suitable to your tastes or needs “the uncongenial roommates were always fighting” |
| adjective | incapable of being used with or connected to other devices or components without modification |
| adjective | of words so related that one contrasts with the other “`rich' and `hard-up' are contrastive terms” |
| adjective | not easy to combine harmoniously |
| adjective | not compatible with other facts |
| adjective | not in keeping with what is correct or proper “completely inappropriate behavior” |
| adjective | used especially of solids or solutions; incapable of blending into a stable homogeneous mixture |
| incompatibility | noun | the quality of being unable to exist or work in congenial combination |
| antagonist | noun | a muscle that relaxes while another contracts |
| antagonism | noun | (biochemistry) interference in or inhibition of the physiological action of a chemical substance by another having a similar structure |
| uncongeniality | noun | a disposition not to be congenial |
| contrast | verb | to show differences when compared; be different |
| discrepancy | noun | a difference between conflicting facts or claims or opinions |
| inappropriateness | noun | inappropriate conduct |