| axle(noun, support, beam, stem, rotation) |
| pivot(noun, center, middle, rotation, target) |
| spindle(noun, support, beam, shaft, rotation) |
| core(noun, center, middle, target, centrality) |
| shaft(noun, support, shoot, stem, something) |
| nucleus(noun, center, middle, target, centrality) |
| center(noun, place, point, base, mediocre) |
| stem(noun, support, shoot, stalk, leg) |
| turning point(noun, expression, idiom, juncture) |
| focus(noun, base, capital, core, center) |
| pin(noun, rotation) |
| pole(noun, support, beam, stem, rotation) |
| kernel(noun, center, middle, target, centrality) |
| navel(noun, center, middle, target, centrality) |
| pith(noun, center, middle, target, centrality) |
| hub(noun, place, base, quick, heart) |
| middle(noun, average, center, focus, middle) |
| heart(noun, place, base, quick, center) |
| marrow(noun, center, middle, target, centrality) |
| midpoint(noun, center, middle, target) |