Synonyms of mismatched

2 Syllables
factious, counter, clashing, warring, jarring, offbeat
3 Syllables
inconstant, ill-suited, adverse, discrepant, contrary, incongruous, opposed, unsuited, conflicting, disagreeing, mismated, unequal, different, discordant, unlike
4 Syllables
uncongenial, unsuitable, inconsonant, unadapted, disconsonant, unrelated, contradistinct, antipodal, dissimilar, disharmonious, incoherent, disparate, opposite, inconsistent
5 Syllables
unequivalent, inadmissible, inappropriate, antithetical, antipathetic, incompatible, inconformable, unassociated
6 Syllables
irreconcilable, contradistinctive