| lift(noun, help, benefit, aid, advantage) |
| loadstone(noun, base, core, center, central) |
| locus(noun, base, core, center, central) |
| lodestone(noun, base, core, center, central) |
| magnet(noun, base, core, center, central) |
| masterfulness(noun, art, artifice, adroitness, adeptness) |
| mastery(noun, proficiency, expertise, know-how, moxie) |
| mecca(noun, base, core, center, central) |
| moxie(noun, proficiency, expertise, know-how, chops) |
| navel(noun, base, core, center, central) |
| navvy(noun, hand, worker, retainer, hireling) |
| nerve center(noun, base, core, center, central) |
| nexus(noun, base, core, center, central) |
| nine-to-fiver(noun, hand, worker, retainer, hireling) |
| nub(noun, base, core, center, central) |
| nucleus(noun, base, core, center, central) |
| omphalos(noun, base, core, center, central) |
| pick-me-up(noun, help, benefit, aid, advantage) |
| pith(noun, base, core, center, central) |
| playground(noun, base, core, center, central) |