| durability(noun, health, time, force, power) |
| firmness(noun, health, force, power, strength) |
| indomitability(noun, spirit, determination, resolution, courage) |
| lustiness(noun, health, force, power, strength) |
| sand(noun, resolution, perseverance) |
| sinew(noun, health, force, power, strength) |
| spirit(noun, go, style, power, strength) |
| stability(noun, health, force, power, strength) |
| doggedness(noun, strength, energy, resolve, determination) |
| exertion(noun, activity, go, drive, power) |
| heart(noun, strength, energy, spirit, ability) |
| intensity(noun, activity, go, style, drive) |
| muscle(noun, health, go, force, style) |
| nerve(noun, health, force, power, strength) |
| obstinacy(noun, resolve, determination, resolution, perseverance) |
| pertinacity(noun, strength, ability, determination, resolution) |
| potency(noun, health, go, force, style) |
| resolve(noun, spirit, determination, resolution, courage) |
| staunchness(noun, resolution) |
| stick-to-it-iveness(noun, perseverance) |