| invariableness(noun, stability) |
| inveteracy |
| invulnerability |
| judgment(noun, spirit, determination, decision, settlement) |
| maturity(noun, support, control, strength, balance) |
| mettle(noun, spirit, determination, firmness, decision) |
| moxie(noun, spirit, determination, resolution, firmness) |
| objectivity |
| obstinacy(noun, spirit, determination, resolution, firmness) |
| persistency(noun, stability) |
| pertinacity(noun, determination, resolution, endurance, persistence) |
| pluck(noun, spirit, determination, resolution, firmness) |
| poise(noun, temper, composure, reasonableness, equanimity) |
| poker face |
| praetorian |
| prolonging(noun, determination, resolution, endurance, persistence) |
| purpose(noun, spirit, determination, resolution, firmness) |
| purposefulness(noun, spirit, determination, resolution, firmness) |
| purposiveness(noun, spirit, determination, resolution, firmness) |
| pursuance(noun, temper, determination, resolution, composure) |