| stamina(noun, health, force, power, strength) |
| vigour |
| vitality(noun, health, force, feeling, body) |
| centrality(noun, center, middle, target) |
| centriole(noun, center, middle, target) |
| content(noun, force, understanding, effect, sense) |
| cynosure(noun, center, middle, target) |
| embodiment(noun, heart, essence, core, nucleus) |
| equidistance(noun, center, middle, target) |
| essential |
| essentiality(noun, quality, cause, start, character) |
| fundamental(cause, source, origin) |
| hypostasis |
| inside(noun, center, middle, target) |
| intent(noun, importance, sense, significance, meaning) |
| interior(noun, core, center, middle, target) |
| intermediacy(noun, center, middle, target) |
| mainstream(noun, center, middle, target) |
| material(noun, organization, area, arrangement, structure) |
| middle of the road(noun, center, middle, target) |