| Solution | Length | |
|---|---|---|
| 3 letters | ||
| vow | 3 | |
| for | 3 | |
| 4 letters | ||
| seal | 4 | |
| aver | 4 | |
| show | 4 | |
| avow | 4 | |
| tell | 4 | |
| word | 4 | |
| sign | 4 | |
| 5 letters | ||
| imply | 5 | |
| vouch | 5 | |
| prove | 5 | |
| swear | 5 | |
| 6 letters | ||
| assert | 6 | |
| sealer | 6 | |
| uphold | 6 | |
| affirm | 6 | |
| secure | 6 | |
| ratify | 6 | |
| verify | 6 | |
| 7 letters | ||
| sustain | 7 | |
| confirm | 7 | |
| warrant | 7 | |
| declare | 7 | |
| BESPEAK | 7 | |
| involve | 7 | |
| suggest | 7 | |
| sponsor | 7 | |
| witness | 7 | |
| testify | 7 | |
| signify | 7 | |
| certify | 7 | |
| support | 7 | |
| probate | 7 | |
| 8 letters | ||
| swear to | 8 | |
| evidence | 8 | |
| validate | 8 | |
| 9 letters | ||
| statement | 9 | |
| reinforce | 9 | |
| establish | 9 | |
| testimony | 9 | |
| undergird | 9 | |
| set forth | 9 | |
| signalize | 9 | |
| undersign | 9 | |
| 10 letters | ||
| strengthen | 10 | |
| profession | 10 | |
| UNDERWRITE | 10 | |
| 11 letters | ||
| acknowledge | 11 | |
| testimonial | 11 | |
| demonstrate | 11 | |
| 12 letters | ||
| STAND UP FOR | 12 | |
| stand behind | 12 | |
| substantiate | 12 | |
| subscribe-to | 12 | |
| 15 letters | ||
| sworn-statement | 15 | |
| 16 letters | ||
| speak for itself | 16 | |