| contentious(adjective, discordant) |
| contradictory(adjective, inharmonious) |
| contrary(adjective, inharmonious) |
| cruel(adjective, severe, bleak, stark, austere) |
| discord(adjective, discordant) |
| divergent(adjective, flat, harsh, contrary, discordant) |
| flat(adjective, hard, severe, sharp, rough) |
| grim(adjective, hard, severe, sharp, flat) |
| guttural(adjective, hard, severe, sharp, flat) |
| hostile(adjective, discordant) |
| inconsistent(adjective, inharmonious) |
| monotonic |
| monotonous |
| off-tone(flat, discordant, dissonant, screeching, tuneless) |
| opposite(adjective, inharmonious) |
| out of pitch(expression, idiom, flat, discordant, dissonant) |
| out of tune(expression, idiom, flat, discordant, unharmonious) |
| quarrelsome(adjective, discordant) |
| sharp(adjective, hard, severe, rough, harsh) |
| squawky(adjective, harsh, loud, asperous, grating) |