| Solution | Length | |
|---|---|---|
| 3 letters | ||
| try | 3 | |
| 4 letters | ||
| seal | 4 | |
| test | 4 | |
| sign | 4 | |
| 5 letters | ||
| taste | 5 | |
| prove | 5 | |
| 6 letters | ||
| verify | 6 | |
| sample | 6 | |
| ratify | 6 | |
| attest | 6 | |
| affirm | 6 | |
| second | 6 | |
| uphold | 6 | |
| 7 letters | ||
| warrant | 7 | |
| try out | 7 | |
| bearout | 7 | |
| confirm | 7 | |
| sustain | 7 | |
| probate | 7 | |
| support | 7 | |
| 8 letters | ||
| swear to | 8 | |
| sanction | 8 | |
| regulate | 8 | |
| research | 8 | |
| 9 letters | ||
| privilege | 9 | |
| undergird | 9 | |
| prescribe | 9 | |
| road test | 9 | |
| undersign | 9 | |
| reinforce | 9 | |
| RECOGNIZE | 9 | |
| 10 letters | ||
| UNDERWRITE | 10 | |
| strengthen | 10 | |
| 11 letters | ||
| affirmafirm | 11 | |
| 12 letters | ||
| RUBBER STAMP | 12 | |
| authenticate | 12 | |
| subscribe-to | 12 | |
| substantiate | 12 | |