| Solution | Length | |
|---|---|---|
| 3 letters | ||
| erg | 3 | |
| pep | 3 | |
| vim | 3 | |
| zip | 3 | |
| 4 letters | ||
| zest | 4 | |
| czar | 4 | |
| poky | 4 | |
| fuel | 4 | |
| life | 4 | |
| push | 4 | |
| zeal | 4 | |
| BIRR | 4 | |
| heat | 4 | |
| snap | 4 | |
| vibe | 4 | |
| pull | 4 | |
| soul | 4 | |
| 5 letters | ||
| vibes | 5 | |
| power | 5 | |
| enron | 5 | |
| vigor | 5 | |
| ardor | 5 | |
| force | 5 | |
| oomph | 5 | |
| solar | 5 | |
| sinew | 5 | |
| drive | 5 | |
| verve | 5 | |
| punch | 5 | |
| steam | 5 | |
| 6 letters | ||
| derive | 6 | |
| vigour | 6 | |
| atomic | 6 | |
| spirit | 6 | |
| virtue | 6 | |
| source | 6 | |
| effort | 6 | |
| thrust | 6 | |
| weight | 6 | |
| 7 letters | ||
| nuclear | 7 | |
| marengo | 7 | |
| tension | 7 | |
| faculty | 7 | |
| wattage | 7 | |
| stamina | 7 | |
| sparkle | 7 | |
| agility | 7 | |
| impetus | 7 | |
| trouble | 7 | |
| 8 letters | ||
| lemonade | 8 | |
| vivacity | 8 | |
| validity | 8 | |
| strength | 8 | |
| business | 8 | |
| violence | 8 | |
| vitality | 8 | |
| VIRILITY | 8 | |
| 9 letters | ||
| estaminet | 9 | |
| virulence | 9 | |
| TOUGHNESS | 9 | |
| vehemence | 9 | |
| 10 letters | ||
| sturdiness | 10 | |
| SUPERPOWER | 10 | |
| strong-arm | 10 | |
| getupandgo | 10 | |
| prepotency | 10 | |
| EFFICIENCY | 10 | |
| 11 letters | ||
| electricity | 11 | |
| superiority | 11 | |
| 12 letters | ||
| productivity | 12 | |
| 13 letters | ||
| staying-power | 13 | |
| 14 letters | ||
| productiveness | 14 | |
| relentlessness | 14 | |