| Rating | Solver | Clue |
|---|---|---|
| UTILISATION | Effective use | |
| UTILITARIAN | Effective use | |
| UTILISE | Make effective use of | |
| EFFICIENT | Effective use of resources | |
| EXPLOIT | Make the most effective use of a resource etc. | |
| MAXIMISE | Make the most effective use of a resource etc | |
| OPTIMISE | Make the most effective use of a resource etc. | |