 |
| |||
| hypogean; subterranean; subterraneous; under-earth; underground | |||
| subsurface | |||
| below ground | |||
| підземний: 269 phrases in 28 subjects |
| American usage, not spelling | 1 |
| Astronautics | 32 |
| Aviation | 2 |
| Botany | 4 |
| Construction | 11 |
| Diplomacy | 12 |
| Ecology | 31 |
| Electronics | 1 |
| Environment | 14 |
| French | 5 |
| General | 30 |
| Geology | 3 |
| Household appliances | 1 |
| Informal | 2 |
| Law | 3 |
| Life sciences | 1 |
| Medical | 1 |
| Metallurgy | 1 |
| Meteorology | 2 |
| Military | 51 |
| Mining | 8 |
| Mythology | 4 |
| Oil and gas | 40 |
| Philosophy | 1 |
| Road construction | 1 |
| Statistics | 1 |
| Technology | 5 |
| Telecommunications | 1 |