| essence(noun, spirit, substance, system, significance) |
| core(noun, quality, character, spirit, significance) |
| quibble(noun, objection, complaint, equivocation, CC) |
| quintessence(noun, quality, character, spirit, system) |
| heart(noun, quality, character, spirit, significance) |
| pith(noun, quality, character, spirit, significance) |
| substance(noun, quality, character, spirit, significance) |
| haecceity |
| cavil(noun, objection, complaint, equivocation, CC) |
| entity(noun, nature, quality, character, spirit) |
| kernel(noun, quality, character, spirit, significance) |
| nub(noun, quality, character, spirit, significance) |
| gist(noun, extract, essence, epitome, embodiment) |
| marrow(noun, quality, character, spirit, significance) |
| meat(noun, quality, character, spirit, significance) |
| nature |
| nucleus(noun, quality, character, spirit, significance) |
| point(noun, quality, character, spirit, significance) |
| quirk(noun, objection, complaint, equivocation, cavil) |
| soul(noun, quality, character, spirit, significance) |