| hard(adjective, difficult, heavy, severity, taxing) |
| important(adjective, heavy, significant, substantial, serious) |
| stringent(adjective, difficult, severity, taxing) |
| tough(adjective, difficult, harsh, heavy, demanding) |
| weighty(adjective, hard, tough, difficult, harsh) |
| burning(adjective, firm, prompt, big, important) |
| crucial(adjective, big, heavy, important, significant) |
| harsh(adjective, difficult, severity, taxing) |
| stern(adjective, severity) |
| taxing(adjective, hard, difficult, harsh, heavy) |
| compelling(adjective, important, significant, serious, essential) |
| imperious |
| serious(adjective, hard, tough, difficult, big) |
| acute(adjective, heavy, important, extreme, serious) |
| compulsory(adjective, important, significant, essential, critical) |
| dour(adjective, severity) |
| emergent(adjective, big) |
| grievous(adjective, hard, tough, difficult, harsh) |
| high-priority |
| nice |