| Acronym | Definition |
|---|
| HWA | Hardware Acceleration (computer architecture) |
| HWA | Home Warranty of America (Lincolnshire, IL) |
| HWA | Happy Wedding Anniversary |
| HWA | Horror Writers Association |
| HWA | Hardware Analysis |
| HWA | Hans Werner Aufrecht |
| HWA | Hemlock Wooly Adelgid |
| HWA | Host Wire Adapter |
| HWA | Hoefer Wysocki Architects (Kansas City, MO) |
| HWA | Here We Are |
| HWA | Heartland Wrestling Association |
| HWA | Hot Wire Anemometry |
| HWA | Hilfswerk Austria (Vienna, Austria) |
| HWA | Hunter Water Australia (Broadmeadow, NSW, Australia) |
| HWA | Hazardous Waste Act |
| HWA | Hold Without Action (US government licensing procedure) |
| HWA | High Wind Advisory |
| HWA | Hoes with Attitudes (rap group) |
| HWA | Hollow World Adventure (gaming) |