| roughcast |
| roughhewn |
| rude(adjective, severe, bleak, stark, austere) |
| ruffled(adjective, harsh, coarse, irregular, uneven) |
| rusty(adjective, hard, severe, sharp, flat) |
| rutty |
| scratchy(adjective, harsh, asperous, grinding, dissonant) |
| screeching(adjective, hard, severe, sharp, flat) |
| severe(adjective, hard, sharp, flat, rough) |
| sour(adjective, hard, severe, sharp, flat) |
| squawky(adjective, harsh, asperous, grinding, dissonant) |
| stark(adjective, severe, rough, bleak, uneven) |
| stony(adjective, harsh, coarse, irregular, uneven) |
| strident(adjective, hard, severe, sharp, flat) |
| stridulous(adjective, hard, severe, sharp, flat) |
| tangled(adjective, harsh, coarse, irregular, uneven) |
| textured |
| tousled(adjective, harsh, coarse, irregular, uneven) |
| tufted(adjective, harsh, coarse, irregular, uneven) |
| tuneless(adjective, hard, severe, sharp, flat) |