| essential(noun, adjective, body, material, big) |
| indispensable(adjective, important, significant, original, essential) |
| vital(adjective, body, material, big, important) |
| fundamental(noun, adjective, body, material, important) |
| important(adjective, significant, original, substantial, serious) |
| crucial(adjective, big, important, significant, original) |
| basic(noun, adjective, body, material, important) |
| cardinal(noun, adjective, important, significant, original) |
| main(adjective, important, significant, original, capital) |
| principal(adjective, body, material, big, important) |
| significant(adjective, big, important, original, substantial) |
| chief(adjective, big, important, significant, substantial) |
| critical(adjective, big, important, significant, substantial) |
| prime(adjective, body, material, important, significant) |
| paramount(adjective, important, significant, original, substantial) |
| central(adjective, important, significant, original, essential) |
| elementary(adjective, easy, important, significant, original) |
| primary(adjective, body, material, big, important) |
| basal(adjective, body, material, important, significant) |
| underlying(adjective, important, significant, original, essential) |