| harsh(adjective, hard, tough, severe, rough) |
| rigorous(adjective, hard, tough, severe, rough) |
| severe(adjective, hard, tough, severe, rough) |
| strict(adjective, hard, tough, severe, rough) |
| rigid(adjective, hard, tough, severe, rough) |
| stern(adjective, hard, tough, severe, rough) |
| austere(adjective, hard, tough, severe, rough) |
| hard(adjective, tough, severe, rough, firm) |
| draconian(adjective, tough, severe, firm, harsh) |
| exacting(adjective, hard, tough, severe, rough) |
| tough(adjective, hard, severe, firm, difficult) |
| binding(adjective, sound, reasonable, severe, rational) |
| demanding(adjective, severe, rigid, tight) |
| exact(adjective, severe, strict, specific, accurate) |
| inflexible(adjective, hard, severe, rough, difficult) |
| acrimonious(adjective, strong, tough, severe, sharp) |
| dour(adjective, hard, tough, severe, firm) |
| forceful(verb, adjective, strong, severe, powerful) |
| poignant(verb, adjective, rigid, tight, compelling) |
| tight |