| tight(adjective, difficult, troublesome) |
| unbending(adjective, severe, demanding) |
| unfeeling(adjective, tough, severe, harsh, cruel) |
| unsparing(adjective, tough, severe, rough, firm) |
| weighty(adjective, hard, severe, difficult, harsh) |
| cautious(adjective, wary, watchful, vigilant) |
| correct(adjective, severe, fastidious) |
| detailed(sensitive, intelligent, shrewd) |
| extortionate(adjective, unreasonable, extravagant, severity, ridiculous) |
| formidable(adjective, tough, severe, rough, difficult) |
| inexorable(adjective, persistent, severity, obstinate, insistent) |
| inflexible(adjective, severe, severity) |
| obdurate(adjective, hard, tough, severe, rough) |
| overcritical(adjective, severe, harsh, cross, critical) |
| rough(adjective, hard, tough, severe, difficult) |
| rugged(adjective, hard, tough, severe, rough) |
| sharp(adjective, severe) |
| assiduous(adjective, thorough, meticulous, painstaking) |
| authoritarian(adjective, tough, severe, firm, harsh) |
| brutal(adjective, hard, tough, severe, rough) |