| fun |
| guts(noun, force, quality, drive, run) |
| juice(noun, action, go, style, drive) |
| mettle(noun, force, quality, drive, character) |
| nerve(noun, health, force, quality, body) |
| pith(noun, health, force, feeling, body) |
| puissance(noun, activity, action, go, force) |
| soundness(noun, health, force, body, power) |
| stability(noun, health, force, body, power) |
| stiffness(drive, stability, strengthener) |
| vehemence(noun, activity, action, go, drive) |
| vibrancy(noun, action, passion, energy, spirit) |
| alacrity(noun, activity, movement, force, plan) |
| animal spirits(noun, liveliness) |
| bite |
| bloom(noun, strength, energy, top, spirit) |
| brawn(noun, health, force, body, power) |
| breath(noun, activity, person, force, quality) |
| effectiveness(noun, go, style, drive, power) |
| elan(noun, activity, action, force, quality) |