Synonyms of disagreeing

1 Syllable
harsh
2 Syllables
harshest, harsher, scratchy, squawky, scratchier
3 Syllables
mismatched, dissenting, opposed, divergent, tuneless, contrarient, dissonant, quarreling, out-of-key, out-of-tune, discordant
4 Syllables
divergence, heretical, misbelieving, unadapted, inharmonic, uneatable, unharmonious, unmusical, unmelodious
5 Syllables
oppositional, indigestible, incompatible, inconformable