| spunk(noun, style, strength, energy, spirit) |
| staying power(noun, expression, idiom, quality, power) |
| moxie(noun, go, style, power, strength) |
| health(noun, force, power, strength, energy) |
| tolerance(noun, strength, energy, ability, vigor) |
| diligence(noun, resolve, restraint, determination, resolution) |
| ruggedness(noun, toughness) |
| vigor(noun, health, go, force, power) |
| resolution(noun, strength, spirit, ability, resolve) |
| mettle(noun, strength, spirit, ability, determination) |
| determination(noun, strength, energy, spirit, resolve) |
| hardiness(noun, health, force, power, strength) |
| resistance(noun, strength, energy, ability, vigor) |
| robustness(noun, health, force, power, strength) |
| starch(noun, strength, energy, spirit, ability) |
| stoutness(noun, health, force, power, strength) |
| stubbornness(noun, resolve, determination, resolution, perseverance) |
| sturdiness(noun, health, force, power, strength) |
| tirelessness(noun, resolve, determination, resolution, perseverance) |
| vim(noun, health, go, force, style) |