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| English thesaurus | |||
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| HARDS | |||
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High-Altitude : 101 phrase in 18 subjects |
| American usage, not spelling | 1 |
| Astronautics | 2 |
| Astronomy | 2 |
| British usage, not spelling | 1 |
| Communications | 1 |
| Earth sciences | 2 |
| Emergency medical care | 1 |
| General | 11 |
| Geology | 1 |
| Hobbies and pastimes | 3 |
| Life sciences | 4 |
| Medical | 27 |
| Military | 1 |
| Optics branch of physics | 4 |
| Paragliding | 1 |
| Physics | 4 |
| Technology | 30 |
| Transport | 5 |