| central(adjective, important, significant, original, basic) |
| cardinal(adjective, importance, important, significant, original) |
| inborn(adjective, characteristic, reasonable, common, ordinary) |
| substantial(adjective, physical, importance, material, big) |
| deep-seated(adjective, characteristic, natural, original, basic) |
| core(adjective, support, action, base, importance) |
| critical(adjective, severe, big, important, significant) |
| inbred(adjective, characteristic, natural, individual, basic) |
| underlying(adjective, simple, plain, important, significant) |
| leading(adjective, feature, state, characteristic, importance) |
| radical(adjective, importance, important, significant, original) |
| grave(adjective, severe, importance, big, important) |
| meaningful(adjective, importance, big, important, significant) |
| serious(adjective, severe, importance, big, important) |
| weighty(adjective, importance, big, important, significant) |
| first(adjective, important, significant, original, prominent) |
| relevant(adjective, importance, big, significant, substantial) |
| basal(adjective, body, simple, plain, material) |
| capital(adjective, importance, important, prominent, prime) |
| influential(adjective, importance, big, important, significant) |