| John Hancock(expression, endorse, prove, verify, validate) |
| authenticate(endorse, prove, verify, substantiate, corroborate) |
| authorize(endorse, prove, substantiate) |
| bear out(expression, endorse, prove, verify, substantiate) |
| certify(endorse, prove, substantiate) |
| constitute(endorse, prove, verify, substantiate, corroborate) |
| corroborate(endorse, prove, verify, substantiate) |
| give stamp of approval(expression, idiom, endorse, prove, substantiate) |
| give the go-ahead(expression, endorse, prove, substantiate, validate) |
| give the green light(expression, idiom, endorse, prove, verify) |
| give the nod(expression, idiom, endorse, prove, substantiate) |
| justify(endorse, prove, verify, substantiate, corroborate) |
| legalize(endorse, prove, verify, substantiate, corroborate) |
| legitimize(endorse, prove, verify, substantiate, corroborate) |
| make binding(expression, endorse, prove, verify, validate) |
| make legal(expression, endorse, prove, verify, validate) |
| make stick(expression, endorse, prove, verify, validate) |
| okay(endorse, prove, substantiate) |
| ratify(endorse, prove, substantiate) |
| rubber-stamp(endorse, prove, substantiate, validate) |