| steadfastness(noun, spirit, determination, confidence, courage) |
| stout-heartedness |
| substance(noun, force, quality, character, strength) |
| temerity(noun, power, spirit, dash, courage) |
| temper(noun, force, quality, character, strength) |
| temperament(noun, force, quality, character, strength) |
| tenor(noun, force, quality, character, strength) |
| tractability |
| truculence(noun, attack, spirit, fight) |
| truculency(noun, attack, spirit, fight) |
| valiancy(noun, quality, spirit, dash, fear) |
| venturesomeness(spirit, dash, courage, nerve, guts) |
| vigor(noun, force, quality, character, strength) |
| vital spark(noun, expression, force, quality, character) |
| vitality(noun, force, quality, character, strength) |
| warmth(noun, force, quality, character, strength) |
| will(noun, force, quality, character, strength) |
| willpower(noun, force, quality, character, strength) |
| zeal |
| zest(noun, force, quality, character, strength) |