| core(noun, center, middle, target) |
| axis(noun, center, middle, target) |
| heart(noun, center, middle, target) |
| hub(noun, center, middle, target) |
| kernel(noun, center, middle, target) |
| marrow(noun, center, middle, target) |
| nave(noun, center, middle, target) |
| navel(noun, center, middle, target) |
| nucleus(noun, center, middle, target) |
| pith(noun, center, middle, target) |
| pivot(noun, center, middle, target) |
| center(noun, point, average, root, focus) |
| centrality(noun, center, middle, target) |
| centriole(noun, center, middle, target) |
| cynosure(noun, center, middle, target) |
| equidistance(noun, center, middle, target) |
| essence(noun, center, middle, target) |
| focal point(noun, center, middle, target) |
| focus(noun, center, middle, target) |
| gist(noun, center, middle, target) |