| earnestness(noun, resolve, determination, resolution, firmness) |
| energy(noun, drive, power, strength, resolve) |
| inflexibility(noun, resolve, determination, firmness, obstinacy) |
| insistency(noun, state, quality, continue, insistence) |
| perpetuation(event, period, extension, continuance, length) |
| perseveration |
| protraction(noun, extension, endurance, stability, continuation) |
| sedulity(noun, care, determination, resolution, perseverance) |
| spunk(noun, drive, strength, energy, ability) |
| standing(noun, strength, ability, resolution, capacity) |
| staunchness(noun, resolve, determination, resolution, firmness) |
| staying power(noun, expression, strength, restraint, resolution) |
| steadiness(perseverance, endurance, stability, ceaselessness) |
| toughness(noun, strength, determination, resolution, firmness) |
| urgency(noun, firmness, intensity, devotion, sincerity) |
| backbone(noun, drive, strength, energy, ability) |
| boldness(noun, drive, energy, resolve, determination) |
| bravery(noun, drive, energy, resolve, determination) |
| bullheadedness(noun, resolution) |
| changelessness |