mutually exclusive

not being in agreement or harmony the two plans are mutually exclusive; implementing one will automatically rule out the other Synonyms clashing, conflicting, disagreeing, discordant, discrepant, incompatible, incongruous, inconsonant, inharmonious, inconsistent, repugnantRelated Words irreconcilable; antagonistic, antipodal, antipodean, antithetical, contradictory, contrary, diametric (or diametrical), opposing, oppositeNear Antonyms akin, like, similarAntonyms accordant, agreeing, compatible, concordant, conformable (to), congruent, congruous, consistent, consonant, correspondent (with or to), harmonious, nonconflicting