Synonyms of clashing

1 Syllable
harsh
2 Syllables
harshest, discord, harsher, strident, jarring, scratchy, squawky, scratchier
3 Syllables
mismatched, contrary, opposed, conflicting, stridulous, tuneless, mismated, wrongheaded, contrariant, different, contrarient, out-of-key, out-of-tune, discordant, unlike
4 Syllables
unsuitable, antagonism, unadapted, inharmonic, disagreement, antagonisms, contradistinct, disharmonious, vociferant, ambivalent, unmusical, unharmonious, unmelodious, opposition
5 Syllables
interference, interposition, oppositional, incompatible, inconformable, divisiveness
6 Syllables
irreconcilable, contradistinctive