| Solution | Length | |
|---|---|---|
| 3 letters | ||
| vet | 3 | |
| try | 3 | |
| 4 letters | ||
| seal | 4 | |
| fill | 4 | |
| show | 4 | |
| aver | 4 | |
| test | 4 | |
| 5 letters | ||
| prove | 5 | |
| check | 5 | |
| unite | 5 | |
| assay | 5 | |
| taste | 5 | |
| vouch | 5 | |
| 6 letters | ||
| uphold | 6 | |
| ratify | 6 | |
| attest | 6 | |
| affirm | 6 | |
| sample | 6 | |
| 7 letters | ||
| warrant | 7 | |
| reenter | 7 | |
| realize | 7 | |
| support | 7 | |
| sustain | 7 | |
| try out | 7 | |
| confirm | 7 | |
| fulfill | 7 | |
| probate | 7 | |
| 8 letters | ||
| validate | 8 | |
| identify | 8 | |
| research | 8 | |
| 9 letters | ||
| ascertain | 9 | |
| establish | 9 | |
| undergird | 9 | |
| road test | 9 | |
| reinforce | 9 | |
| 10 letters | ||
| strengthen | 10 | |
| spellcheck | 10 | |
| 11 letters | ||
| demonstrate | 11 | |
| 12 letters | ||
| authenticate | 12 | |
| substantiate | 12 | |
| 13 letters | ||
| particularize | 13 | |