| not smooth(expression, adjective, hard, severe, sharp) |
| off-key(adjective, hard, severe, sharp, flat) |
| out-of-key(adjective, hard, severe, sharp, flat) |
| out-of-tune(adjective, hard, severe, sharp, flat) |
| rigid(adjective, hard, severe, sharp, flat) |
| rusty(adjective, hard, severe, sharp, flat) |
| screeching(adjective, hard, severe, sharp, flat) |
| severe(adjective, hard, sharp, flat, rough) |
| sharp(adjective, hard, severe, flat, rough) |
| sour(adjective, hard, severe, sharp, flat) |
| squawky(adjective, harsh, loud, grating, grinding) |
| stertorous(adjective, rough, harsh, loud, gruff) |
| stridulant(adjective, harsh, loud, grating, grinding) |
| tuneless(adjective, hard, severe, sharp, flat) |
| uneven(adjective, hard, severe, sharp, rough) |
| unharmonious(adjective, asperous, dissonant) |
| unlevel(adjective, hard, severe, sharp, flat) |
| unmelodious(adjective, hard, severe, sharp, flat) |
| unmusical(adjective, hard, severe, sharp, flat) |
| unpleasant(adjective, severe, rough, harsh, offensive) |