| belly(heart, core, guts, inside, interior) |
| bosom(heart, core, inside) |
| center(heart, core, guts, inside, interior) |
| contents(heart, core, guts, inside, interior) |
| heart(core, guts, inside, interior, innards) |
| heartland(heart, core, inside) |
| innards(heart, core, guts, inside, interior) |
| inside(heart, core, interior, insides) |
| interior(noun, heart, core, center, guts) |
| internal organs(noun, expression, guts, innards, entrails) |
| internals(heart, core, inside) |
| intrinsicality(heart, core, inside) |
| lining(heart, core, inside, interior, insides) |
| marrow(heart, core, inside) |
| midst(heart, core, inside) |
| pith(heart, core, inside) |
| pulp(heart, core, inside) |
| soul(heart, core, guts, inside, interior) |
| substance(heart, core, inside) |
| viscera(heart, core, guts, inside, innards) |