| incompatible(adjective, hard, severe, sharp, flat) |
| inharmonic |
| jagged(adjective, hard, severe, sharp, flat) |
| jangling(adjective, hard, severe, sharp, flat) |
| musicless |
| noisy(adjective, hard, severe, sharp, flat) |
| nonmelodious |
| not smooth(expression, adjective, hard, severe, sharp) |
| out-of-key(adjective, hard, severe, sharp, flat) |
| out-of-tune(adjective, hard, severe, sharp, flat) |
| out of tone(expression, idiom) |
| rasping(adjective, hard, severe, sharp, flat) |
| rigid(adjective, hard, severe, sharp, flat) |
| rough(adjective, hard, severe, sharp, flat) |
| rugged(adjective, hard, severe, sharp, flat) |
| rusty(adjective, hard, severe, sharp, flat) |
| scratchy(adjective, harsh) |
| screeching(adjective, hard, severe, sharp, flat) |
| severe(adjective, hard, sharp, flat, rough) |
| shrill |