| Term | Full Form | Category |
|---|---|---|
| HX | Halifax (WW II Convoy Route) | Others |
| HX | Herc Xena | Others |
| HX | Hercules Xena | Others |
| HX | Herding Excellent | Others |
| HX | Histiocytosis X | Others |
| HX | HomeX | Others |
| HX | Hotline X | Others |
| HX | Hyper Xtream | Others |
| HX | Hypoxanthine Xanthine | Others |
| Hx | Medical History | Others |
| HX | THOR database Cross-reference Hsh file | Others |