| fundamental(shorts, undercarriage) |
| nitty-gritty(noun, substance, effect, score, heart) |
| root(noun, law, heart, basic, be) |
| basic(noun, heart, fundamental, shorts, bosom) |
| cardinal point(expression, idiom, importance) |
| centre |
| essential(fundamental, shorts, undercarriage) |
| great point(expression, idiom, importance) |
| import(noun, strength, effect, subject, meaning) |
| keystone |
| mass(noun, organization, strength, material, effect) |
| matter(noun, organization, area, strength, material) |
| nuts and bolts(expression, idiom, substance, effect, score) |
| quick(noun, informal, heart, basic, root) |
| quiddity |
| significance(noun, effect, meaning, essence, import) |
| sine qua non(expression, idiom, importance) |
| sum and substance(expression, idiom, importance) |
| thrust(strength, effect, subject, meaning, essence) |
| amount(noun, area, strength, effect, quantity) |