| crucial(adjective, characteristic, importance, significance, essential) |
| vital(adjective, characteristic, importance, significance, essential) |
| consequential(adjective, characteristic, importance, essential, criticality) |
| momentous(adjective, characteristic, importance, essential, criticality) |
| significant(adjective, characteristic, importance, essential, criticality) |
| weighty(adjective, characteristic, importance, essential, criticality) |
| acute(adjective, characteristic, importance, significance, criticality) |
| critical(adjective, characteristic, importance, significance, criticality) |
| dangerous(adjective, characteristic, importance, significance, criticality) |
| decisive(adjective, characteristic, importance, significance, criticality) |
| desperate(adjective, characteristic, importance, significance, criticality) |
| dire(adjective, characteristic, importance, significance, criticality) |
| essential(adjective, characteristic, importance, significance) |
| grave(adjective, characteristic, importance, significance, criticality) |
| serious(adjective, characteristic, importance, significance, criticality) |
| urgent(adjective, characteristic, importance, significance, criticality) |
| important(adjective, characteristic, importance, significance) |
| all-important(adjective, characteristic, importance, criticality) |
| arch(adjective, characteristic, importance, essential) |
| capital(adjective, characteristic, importance, essential) |