HWSS
| Acronym | Definition |
|---|---|
| HWSS | Hoof Wall Separation Syndrome (horses) |
| HWSS | Heavyweight Spaceship (gaming) |
| HWSS | Helpless When She Smiles (Backstreeet Boys song) |
| HWSS | Hot Water Supply Systems (renewable energy; Somerset, UK) |
| HWSS | High Wall Shear Stress |
| HWSS | Hazardous Waste and Superfund Staff (EPA) |
| HWSS | Ministry of Health, Welfare and Social Security (Greece) |
| HWSS | Harwell Wilson Surgical Society (Memphis, TN) |