| Solution | Length | |
|---|---|---|
| 4 letters | ||
| slow | 4 | |
| 5 letters | ||
| vapid | 5 | |
| stiff | 5 | |
| 6 letters | ||
| stuffy | 6 | |
| stodgy | 6 | |
| solemn | 6 | |
| prolix | 6 | |
| wooden | 6 | |
| 7 letters | ||
| tedious | 7 | |
| sterile | 7 | |
| 8 letters | ||
| studious | 8 | |
| rabbinic | 8 | |
| singsong | 8 | |
| 9 letters | ||
| tasteless | 9 | |
| UNVARYING | 9 | |
| weariness | 9 | |
| scholarly | 9 | |
| 10 letters | ||
| spiritless | 10 | |
| UNEVENTFUL | 10 | |
| scholastic | 10 | |
| 11 letters | ||
| wet blanket | 11 | |
| superficial | 11 | |
| 12 letters | ||
| professorial | 12 | |