 |
| English thesaurus | |||
| |||
| HALO | |||
| high-altitude: 71 phrases in 17 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 |
| Hobbies and pastimes | 3 |
| Life sciences | 4 |
| Medical | 27 |
| Military | 1 |
| Optics branch of physics | 4 |
| Paragliding | 1 |
| Physics | 4 |
| Technology | 1 |
| Transport | 5 |