| crucial(adjective, great, severe, extraordinary) |
| important(adjective, great, severe, extraordinary) |
| vital(adjective, great, severe, heavy) |
| severe(adjective, hard, tough, severe, difficult) |
| serious(adjective, hard, great, tough, severe) |
| urgent(adjective, hard, direct, tough, severe) |
| pressing(adjective, hard, direct, tough, difficult) |
| momentous(adjective, great, severe, extraordinary) |
| significant(adjective, great, extraordinary, heavy) |
| essential(adjective, severe, important, significant) |
| decisive(adjective, great, severe, extraordinary) |
| weighty(adjective, hard, hurt, great, tough) |
| consequential(adjective, harsh, heavy, important) |
| imperative(adjective, important, determined, significant) |
| necessary(adjective, important, significant, substantial) |
| exigent(adjective, hard, tough, difficult) |
| heavy(adjective, great, harsh, extraordinary) |
| portentous(adjective, bad, heavy, significant) |
| principal(adjective, great, important, substantial) |
| primary(adjective, important, significant, substantial) |