| strength of character(noun, expression, idiom, drive, resolve) |
| strength of mind(noun, expression, idiom, character, strength) |
| strong will(noun, expression, spirit, determination, firmness) |
| subordination(noun, control, training, strictness, self-control) |
| substance(noun, force, quality, character, strength) |
| temper(noun, force, quality, character, strength) |
| temperament(noun, force, quality, feeling, drive) |
| tenacity(noun, drive, energy, spirit, resolve) |
| tenor(noun, force, quality, character, strength) |
| valor(noun, drive, energy, resolve, determination) |
| velleity(noun, feeling, drive, power, character) |
| vigor(noun, force, quality, power, character) |
| vital spark(noun, expression, force, quality, character) |
| vitality(noun, force, quality, character, strength) |
| warmth(noun, force, quality, character, strength) |
| will-power |
| willfulness(noun, feeling, drive, power, character) |
| wishes(noun, feeling, drive, power, character) |
| yearning(noun, feeling, drive, power, character) |
| zest(noun, force, quality, character, strength) |