| Rating | Solver | Clue |
|---|---|---|
| INDUBITABLE | Undoubted | |
| ABSOLUTE | Undoubted (proof) | |
| UNDOUBTED | Not doubted; not called in question; indubitable; indisputable; as, undoubted proof; undoubted hero. | |
| TRUISM | An undoubted or self-evident truth; a statement which is pliantly true; a proposition needing no proof or argument; -- opposed to falsism. | |
| UN- | ...ss; as, unending, unparalleled, undisciplined, undoubted, unsafe, and the like. ... | |