| critical(adjective, hard, direct, tough, severe) |
| important(adjective, tough, severe, heavy, significant) |
| pressing(adjective, hard, direct, tough, severe) |
| vital(adjective, severe, big, heavy, important) |
| imperative(adjective, strong, firm, prompt, big) |
| crucial(adjective, tough, severe, big, heavy) |
| insistent(adjective, characteristic, hard, tough, continue) |
| compelling(adjective, clear, strong, great, property) |
| exigent(adjective, hard, tough, firm, difficult) |
| importunate(adjective, characteristic, hard, tough, continue) |
| instant(adjective, direct, prompt, importance, big) |
| essential(adjective, severe, big, important, significant) |
| serious(adjective, hard, tough, severe, difficult) |
| immediate(adjective, delay, property, sudden, needing) |
| grave(adjective, severe, significant, substantial, serious) |
| earnest(adjective, characteristic, strong, big, enthusiastic) |
| necessary(adjective, important, substantial, valuable, essential) |
| clamorous(adjective, hard, tough, firm, difficult) |
| demanding(adjective, hard, tough, firm, difficult) |
| desperate(adjective, severe, intense, passionate, important) |