| Solution | Length | |
|---|---|---|
| 4 letters | ||
| sour | 4 | |
| acid | 4 | |
| sore | 4 | |
| tart | 4 | |
| 5 letters | ||
| rough | 5 | |
| acrid | 5 | |
| sharp | 5 | |
| 6 letters | ||
| severe | 6 | |
| 7 letters | ||
| pungent | 7 | |
| violent | 7 | |
| 8 letters | ||
| strident | 8 | |
| vehement | 8 | |
| stinging | 8 | |
| virulent | 8 | |
| rigorous | 8 | |
| venomous | 8 | |
| scathing | 8 | |
| spiteful | 8 | |
| stabbing | 8 | |
| 9 letters | ||
| poisonpen | 9 | |
| stringent | 9 | |
| rancorous | 9 | |
| repugnant | 9 | |
| trenchant | 9 | |
| 11 letters | ||
| QUARRELSOME | 11 | |