| confidential(adjective, intimate, private, personal) |
| contents(noun, heart, core, center, guts) |
| cynosure(noun, center, middle, target) |
| deep-rooted(adjective, private, mental, inner) |
| depths |
| 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) |
| hub(noun, center, middle, target) |
| indoors |
| intermediacy(noun, center, middle, target) |
| inwards |
| mainstream(noun, center, middle, target) |
| marrow(noun, core, center, middle, target) |
| middle of the road(noun, center, middle, target) |
| midpoint(noun, center, middle, target) |
| nave(noun, center, middle, target) |
| navel(noun, center, middle, target) |