| crucial(adjective, important, significant, serious, critical) |
| important(adjective, important, significant, serious, critical) |
| momentous(adjective, feature, state, characteristic, important) |
| critical(adjective, important, significant, serious, vital) |
| essential(adjective, feature, state, characteristic, important) |
| central(adjective, important, critical, vital, main) |
| vital(adjective, important, significant, serious, critical) |
| decisive(adjective, important, significant, serious, critical) |
| main(adjective, important, significant, serious, basic) |
| overriding(adjective, feature, state, characteristic, important) |
| principal(adjective, important, serious, basic, prime) |
| chief(adjective, important, significant, serious, prime) |
| key(adjective, important, essential) |
| significant(adjective, important, serious, critical, vital) |
| capital(adjective, most important) |
| cardinal(noun, adjective, important, significant, serious) |
| grave(adjective, important, significant, serious, vital) |
| overruling(adjective, important, serious, basic, prime) |
| primary(adjective, main, most important) |
| iconic(adjective, feature, state, characteristic, most important) |