| resilience(noun, state, quality, strength, ability) |
| strength(noun, force, body, power, ability) |
| constancy(noun, drive, strength, energy, spirit) |
| diligence(noun, resolve, determination, resolution, firmness) |
| inflexibility(noun, resolve, determination, firmness, severity) |
| stamina(noun, health, force, power, strength) |
| patience(noun, strength, ability, determination, resolution) |
| tenaciousness(noun, state, quality, resolve, resist) |
| guts(noun, drive, power, strength, energy) |
| indefatigability(noun, resolve, determination, resolution, perseverance) |
| nerve(noun, health, force, body, drive) |
| staunchness(noun, spirit, resolve, determination, resolution) |
| backbone(noun, health, force, body, drive) |
| pluck(noun, drive, power, strength, energy) |
| assiduity(noun, increase, line, extension, persistence) |
| bravery(noun, drive, power, strength, energy) |
| bullheadedness(noun, state, quality, resist, determination) |
| dauntlessness(noun, drive, power, strength, energy) |
| devotion(noun, drive, honor, passion, resolve) |
| hardness(noun, severity, harshness, conformity, strictness) |