| English thesaurus | |||
| |||
| HARDS | |||
|
High-Altitude : 52 phrases in 14 subjects |
| Astronautics | 2 |
| Astronomy | 3 |
| Aviation | 4 |
| Communications | 5 |
| Earth sciences | 2 |
| Environment | 1 |
| General | 8 |
| Hobbies and pastimes | 3 |
| Life sciences | 3 |
| Medical | 10 |
| Military | 2 |
| Paragliding | 1 |
| Technology | 1 |
| Transport | 7 |