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| difficult terrain (LadaP) | |||
| hostile terrain | |||
| challenging terrain (translator911) | |||
| rugged topography | |||
| rugged relief (Leonid Dzhepko) | |||
| composite topography (сформированный в течение двух или более циклов эрозии) | |||
| сложный рельеф: 8 phrases in 6 subjects |
| Cartography | 2 |
| Ecology | 2 |
| General | 1 |
| Geology | 1 |
| Makarov | 1 |
| Rail transport | 1 |