| Acronym | Definition |
|---|
| RCHA➣Royal Canadian Horse Artillery |
| RCHA➣Rutgers Center for Historical Analysis (New Jersey) |
| RCHA➣Ranch Cutting Horse Association (Holliday, TX) |
| RCHA➣Registered Care Homes Association (UK) |
| RCHA➣Rolette County Housing Authority (Rolette, ND) |