| navel(noun, center, middle, target, belly button) |
| umbilicus(noun, navel, belly button, omphalus) |
| bellybutton(noun, navel, belly button, umbilicus, omphalus) |
| focus(noun, base, capital, core, center) |
| omphalus(noun, navel, belly button, umbilicus) |
| hub(noun, center, middle, target) |
| belly button(noun, navel, umbilicus, omphalus) |
| nucleus(noun, center, middle, target) |
| core(noun, center, middle, target) |
| stomach-button(noun, navel, belly button, umbilicus, omphalus) |
| stomach button(noun, navel, belly button, umbilicus, omphalus) |
| axis(noun, center, middle, target) |
| heart(noun, center, middle, target) |
| kernel(noun, center, middle, target) |
| marrow(noun, center, middle, target) |
| nave(noun, center, middle, target) |
| nexus(noun, connection, link, tie, bond) |
| pith(noun, center, middle, target) |
| pivot(noun, center, middle, target) |
| center(noun, point, average, root, focus) |