| Abbreviation | Definition |
|---|---|
| HARS | High Altitude Renal Syndrome |
| HAVS | Hand and Arm Vibration Syndrome |
| HAVS | Hand Arm Vibration Syndrome |
| HAVS | Hand Arms Vibrating Syndrome |
| HBS | Hemorrhagic Bowel Syndrome |
| HBS | Hot B*tch Syndrome |
| HDS | Human Default Syndrome |
| HEDS | Hypermobile Ehlers Danlos syndrome |
| HFRS | Haemorrhagic fever with renal syndrome |
| HFRS | Hemorrhagic Fever Renal Syndrome |
| HHCS | Hereditary Hyperferritinaemia Cataract Syndrome |
| HHCS | Hereditary Hyperferritinemia Cataract Syndrome |
| HHMS | Humoral Hypercalcaemia of Malignancy Syndrome |
| HHNS | Hyperglycemic Hyperosmolar Nonketotic Syndrome |
| HHNS | Hyperosmolar Hyperglycemic Nonketotic Syndrome |
| HIES | Hyper Immunoglobulin E Syndrome |
| HMPS | Hereditary Mixed Polyposis Syndrome |
| HOS | Hardened Oil Syndrome |
| HOTS | Hormal Output Toxicity Syndrome |
| HPNS | High-Pressure Nervous Syndrome |