| Rating | Solver | Clue |
|---|---|---|
| QUADRUPLE | Fourfold | |
| QUADRUPLING | Increasing fourfold | |
| QUADRUPLEX | Fourfold; folded or doubled twice. | |
| FOURFOLD | Four times; quadruple; as, a fourfold division. | |
| QUADRUPLICATE | To make fourfold; to double twice; to quadruple. | |
| QUADRIGEMINOUS | Fourfold; having four similar parts, or two pairs of similar parts. | |
| QUADRI- | A combining form meaning four, four times, fourfold; as, quadricapsular, having four capsules. | |
| QUADRUPLICATION | The act of making fourfold; a taking four times the simple sum or amount. | |
| QUADRUPLY | To a fourfold quantity; so as to be, or cause to be, quadruple; as, to be quadruply recompensed. | |
| FOLD | ...fly in composition, to denote multiplication or increase in a geometrical ratio, the doubling, tripling, etc., of anything; as, fourfold, four ... | |