| pith(noun, heart, essence, core, nucleus) |
| sum and substance(expression, force, heart, essence, center) |
| center(force, heart, essence, nucleus) |
| core(heart, essence, nucleus) |
| crux(heart, essence, nucleus) |
| embodiment(force, heart, essence, center, nucleus) |
| essence(heart, nucleus) |
| fiber(heart, essence, nucleus) |
| force(heart, essence, center, nucleus) |
| gist(force, heart, essence, center, nucleus) |
| heart(force, essence, center, nucleus) |
| importance(force, heart, essence, center, nucleus) |
| kernel(heart, essence, nucleus) |
| marrow(force, heart, essence, center, nucleus) |
| meat(force, heart, essence, center, nucleus) |
| medulla(force, heart, essence, center, nucleus) |
| nitty-gritty(heart, essence, nucleus) |
| nub(heart, essence, nucleus) |
| nucleus(force, heart, essence, center) |
| pulp(force, heart, essence, center, nucleus) |