| vitality(noun, force, quality, drive, character) |
| warmth(noun, force, quality, character, strength) |
| bias |
| bosom(noun, emotion, mood, temperament, core) |
| bottom |
| brass(noun, spirit, courage, liveliness, guts) |
| diathesis |
| elan(noun, force, quality, power, character) |
| essence(noun, force, quality, character, strength) |
| force(noun, quality, character, strength, spirit) |
| gist(noun, emotion, mood, temperament, core) |
| gusto(noun, emotion, mood, temperament, core) |
| gut(noun, quality, slang, fear) |
| hardiness(noun, spirit, courage, liveliness, daring) |
| humor(noun, nature, force, quality, kind) |
| inclination(noun, nature, quality, character, emotion) |
| indomitability(noun, strength, spirit, determination, courage) |
| kidney(noun, strength, spirit, determination, courage) |
| liveliness(noun, force, quality, character, strength) |
| marrow(noun, emotion, mood, temperament, core) |