| Solution | Length | |
|---|---|---|
| 3 letters | ||
| let | 3  | |
| 4 letters | ||
| sign | 4  | |
| seal | 4  | |
| 5 letters | ||
| allow | 5  | |
| sayok | 5  | |
| 6 letters | ||
| sayyes | 6  | |
| permit | 6  | |
| second | 6  | |
| assent | 6  | |
| ratify | 6  | |
| 7 letters | ||
| warrant | 7  | |
| support | 7  | |
| release | 7  | |
| license | 7  | |
| consent | 7  | |
| 8 letters | ||
| sanction | 8  | |
| validate | 8  | |
| swear to | 8  | |
| 9 letters | ||
| undersign | 9  | |
| authorise | 9  | |
| vouchsafe | 9  | |
| 10 letters | ||
| UNDERWRITE | 10  | |
| 12 letters | ||
| SAY THE WORD | 12  | |
| subscribe-to | 12  | |
| RUBBER STAMP | 12  | |