| purposefulness(noun, drive, energy, resolve, determination) |
| qualification(force, power, strength, ability, potency) |
| qualifiedness(control, force, power, strength, ability) |
| recklessness(spirit, dash, courage, nerve, daring) |
| resolve(noun, drive, energy, spirit, determination) |
| respectability(noun, virtue) |
| sand(noun, informal, bravery) |
| self-confidence(noun, drive, energy, resolve, determination) |
| sinew(control, force, power, strength, ability) |
| single-mindedness(noun, drive, energy, resolve, determination) |
| soldierly quality |
| spine(noun, drive, strength, energy, resolve) |
| stalwartness |
| stamina(strength, spirit, determination, courage, firmness) |
| starch(noun, strength, spirit, determination, courage) |
| staying power(expression, strength, determination, courage, firmness) |
| steadfastness(noun, drive, energy, resolve, determination) |
| stick-to-itiveness(noun, strength, determination, courage, firmness) |
| stiff upper lip(noun, expression, idiom, drive, energy) |
| strenuousness(control, force, power, strength, ability) |