| Rating | Solver | Clue |
|---|---|---|
| OPERATIVE | Exerting force | |
| FORCEFUL | Full of or processing force; exerting force; mighty. | |
| ENERGETICAL | Having energy or energies; possessing a capacity for vigorous action or for exerting force; active. | |
| STRONG | Having active physical power, or great physical power to act; having a power of exerting great bodily force; vigorous. | |
| SINGLE-ACTING | Having simplicity of action; especially (Mach.), acting or exerting force during strokes in one direction only; -- said of a reciprocating engine, pump, etc. | |