| heart(noun, support, action, substance, base) |
| heart of the matter(noun, expression, idiom, substance, heart) |
| important matter(noun, expression, substance, heart, soul) |
| infrastructure(noun, support, action, base, beginning) |
| justification(noun, support, action, base, beginning) |
| kernel(noun, substance, heart, soul, focus) |
| keynote(noun, support, action, base, beginning) |
| keystone(noun, support, action, base, beginning) |
| law(noun, support, action, base, beginning) |
| matter of fact(expression, idiom) |
| meat(noun, substance, heart, soul, focus) |
| meat and potatoes(noun, expression, idiom, substance, heart) |
| name of the game(noun, expression, idiom, substance, heart) |
| nexus(noun, support, action, base, beginning) |
| nucleus(noun, support, action, base, beginning) |
| nuts and bolts(noun, expression, idiom, substance, heart) |
| premise(noun, support, action, base, beginning) |
| presumption(noun, support, action, base, beginning) |
| presupposition(noun, support, action, base, beginning) |
| principal element(noun, expression, support, action, base) |