| essence(noun, base, capital, core, gist) |
| heart(noun, base, capital, essence, core) |
| kernel(noun, base, capital, essence, core) |
| mechanics(noun, study, science, education) |
| nub(noun, base, capital, essence, core) |
| nucleonics(noun, study, science, education) |
| optics(noun, study, science, education) |
| pith(noun, base, capital, essence, core) |
| rheology(noun, study, science, education) |
| thermodynamics(noun, study, science, education) |
| uranology(noun, study, science, education) |
| bottom line(noun, expression, essence, core, gist) |
| ground zero(noun, expression, base, capital, core) |
| happy hunting ground(noun, expression, base, capital, core) |
| hot spot(noun, expression, base, capital, core) |
| meat and potatoes(noun, expression, essence, core, gist) |
| nerve center(noun, expression, base, capital, core) |
| answer(noun, take, response, reply) |
| attraction(noun, base, capital, core, axis) |
| axis(noun, base, capital, core) |