sort by Rank | Alpha
| Possible Meanings | Rank |
| HIV AIDS Awareness Package | ** |
| Healthy Asian American Project | ** |
| Hispanic Adult Achievers Program | ** |
| HTLV-1 associated arthropathy | ** |
| HTLV-I associated arthropathy | ** |
| HTLV-I)-associated arthropathy | ** |
| HTLV-I-associated arthropathy | ** |
| HORN African Americans for Peace | ** |
| Holston Army Ammunition Plant | ** |
| HIV AIDS Advocacy Program | ** |
| High Altitude Aeronautical Platforms | ** |
| Homebase Advanced Assignment Program | ** |
| Healthy Asian Americans Project | * |
| Homebase and Advance Assignment Program | * |
| HIV AIDS Awareness Project | * |
| Human Adipocyte Acid Phosphatase | * |
| Historical Annual Average Pumpage | * |