| lustiness |
| mightiness |
| moderation(noun, restraint, capacity, fortitude, stamina) |
| nonresistance(noun, restraint, capacity, fortitude, composure) |
| obduracy(noun, resolve, determination, firmness, persistence) |
| passiveness(noun, restraint, capacity, fortitude, composure) |
| passivity(noun, restraint, capacity, fortitude, composure) |
| permanence(noun, strength, resolution, fortitude, stamina) |
| persistence(noun, drive, power, strength, energy) |
| pertinacity(noun, strength, ability, resolve, determination) |
| pith |
| poise(noun, restraint, capacity, fortitude, composure) |
| powerfulness |
| resignation(noun, strength, ability, restraint, resolution) |
| resistance(noun, strength, energy, ability, vigor) |
| resoluteness(noun, resolve, determination, firmness, persistence) |
| resolution(noun, strength, spirit, ability, resolve) |
| resolve(noun, determination, courage, firmness, fortitude) |
| restraint(noun, strength, ability, resolution, capacity) |
| ruggedness |