| Rating | Solver | Clue |
|---|---|---|
| BOOST | Impetus | |
| THRUST | Impetus | |
| DRIVE | Impetus | |
| MOMENTUM | Impetus | |
| BIRR | A rush or impetus; force. | |
| BENT | Tension; force of acting; energy; impetus. | |
| IMPETUOUS | Rushing with force and violence; moving with impetus; furious; forcible; violent; as, an impetuous wind; an impetuous torrent. | |
| OVULIST | ...of fecundation the spermatozoa simply gave the impetus which caused the unfolding of the egg, in which all generations were inclosed one within ... | |