| Solution | Length | |
|---|---|---|
| 5 letters | ||
| rough | 5 | |
| spiny | 5 | |
| SOBER | 5 | |
| stiff | 5 | |
| awful | 5 | |
| tough | 5 | |
| steep | 5 | |
| 6 letters | ||
| severe | 6 | |
| signal | 6 | |
| potent | 6 | |
| dragon | 6 | |
| wicked | 6 | |
| uphill | 6 | |
| thorny | 6 | |
| solemn | 6 | |
| strong | 6 | |
| tricky | 6 | |
| rugged | 6 | |
| sticky | 6 | |
| 7 letters | ||
| weighty | 7 | |
| nemeses | 7 | |
| nemesis | 7 | |
| awesome | 7 | |
| dreaded | 7 | |
| slavish | 7 | |
| fearful | 7 | |
| serious | 7 | |
| doughty | 7 | |
| 8 letters | ||
| terrific | 8 | |
| dreadful | 8 | |
| horrible | 8 | |
| ticklish | 8 | |
| TOILSOME | 8 | |
| rigorous | 8 | |
| alarming | 8 | |
| striking | 8 | |
| daunting | 8 | |
| shocking | 8 | |
| terrible | 8 | |
| fearsome | 8 | |
| superior | 8 | |
| uncommon | 8 | |
| 9 letters | ||
| herculean | 9 | |
| leviathan | 9 | |
| APPALLING | 9 | |
| wonderful | 9 | |
| 10 letters | ||
| moralfibre | 10 | |
| crocodiles | 10 | |
| remarkable | 10 | |
| TERRIFYING | 10 | |
| tremendous | 10 | |
| 11 letters | ||
| redoubtable | 11 | |
| 12 letters | ||
| discouraging | 12 | |