| core(noun, adjective, good, quality, understanding) |
| heart(noun, law, good, part, force) |
| nub(noun, adjective, good, end, quality) |
| substance(noun, good, force, quality, understanding) |
| essence(noun, understanding, spirit, substance, idea) |
| marrow(noun, quality, character, strength, spirit) |
| meat(noun, good, force, quality, understanding) |
| gist(noun, good, force, understanding, strength) |
| pith(noun, force, quality, understanding, character) |
| kernel(noun, quality, character, strength, spirit) |
| nuts and bolts(noun, expression, idiom, feature, good) |
| center(noun, strength, effect, subject, emotion) |
| fundamental(noun, adjective, part, important, essential) |
| inwardness |
| nucleus(noun, quality, character, spirit, short) |
| quintessence(noun, quality, character, strength, spirit) |
| stuff(noun, good, force, quality, understanding) |
| basics(noun, support, substance, authority, facts) |
| bottom line(noun, expression, law, good, force) |
| crux(noun, part, quality, character, strength) |