| Solution | Length | |
|---|---|---|
| 3 letters | ||
| pea | 3 | |
| 4 letters | ||
| ryan | 4 | |
| wary | 4 | |
| rapt | 4 | |
| wake | 4 | |
| 5 letters | ||
| vigil | 5 | |
| annie | 5 | |
| ready | 5 | |
| sharp | 5 | |
| smart | 5 | |
| awake | 5 | |
| quick | 5 | |
| 6 letters | ||
| ephron | 6 | |
| steady | 6 | |
| prompt | 6 | |
| stable | 6 | |
| 7 letters | ||
| zealous | 7 | |
| unquiet | 7 | |
| prudent | 7 | |
| wakeful | 7 | |
| 8 letters | ||
| UNTIRING | 8 | |
| insomnia | 8 | |
| stubborn | 8 | |
| restless | 8 | |
| WATCHFUL | 8 | |
| tireless | 8 | |
| vehement | 8 | |
| SEDULOUS | 8 | |
| vigilant | 8 | |
| resolute | 8 | |
| 9 letters | ||
| sharpness | 9 | |
| UNDAUNTED | 9 | |
| UNWEARIED | 9 | |
| tenacious | 9 | |
| steadfast | 9 | |
| unsparing | 9 | |
| UNFAILING | 9 | |
| 10 letters | ||
| SHARP EYED | 10 | |
| UNFLAGGING | 10 | |
| UNSWERVING | 10 | |
| unblinking | 10 | |
| relentless | 10 | |
| wide awake | 10 | |
| UNWAVERING | 10 | |
| 11 letters | ||
| UNREMITTING | 11 | |
| preoccupied | 11 | |
| unfaltering | 11 | |
| unrelenting | 11 | |
| unflinching | 11 | |
| 13 letters | ||
| UNCONQUERABLE | 13 | |
| UNINTERRUPTED | 13 | |
| single-minded | 13 | |