| Rating | Solver | Clue |
|---|---|---|
| REPETITION | Duplication | |
| GEMINATION | A doubling; duplication; repetition. | |
| CONDUPLICATION | A doubling together or folding; a duplication. | |
| DUPLICATION | The act or process of dividing by natural growth or spontaneous action; as, the duplication of cartilage cells. | |
| MESOLABE | An instrument of the ancients for finding two mean proportionals between two given lines, required in solving the problem of the duplication of the cube. | |