| kernel(noun, substance, heart, soul, focus) |
| majority(noun, part, portion, share, segment) |
| meat(noun, body, substance, mass, advantage) |
| meat and potatoes(noun, expression, idiom, substance, heart) |
| most(noun, part, portion, share, segment) |
| name of the game(noun, expression, idiom, substance, heart) |
| nitty-gritty(noun, facts, details, essentials, fundamentals) |
| nuts and bolts(noun, expression, idiom, substance, heart) |
| quintessence(noun, substance, heart, soul, focus) |
| reality(noun, substance, heart, soul, focus) |
| root(noun, substance, heart, soul, details) |
| soul(noun, substance, heart, focus, details) |
| substance(noun, heart, soul, focus, bulk) |
| crux of the matter(expression, idiom, details, essentials, fundamentals) |
| details(essentials, fundamentals) |
| essential |
| essentials(details, fundamentals) |
| greater |
| main part(noun, body) |
| major |