| Acronym | Definition |
|---|
| HHPA➣Hexahydrophthalic Anhydride |
| HHPA➣Hardy Holzman Pfeiffer Associates (New York) |
| HHPA➣Juanita K. Hammons Hall for the Performing Arts (Missouri State University) |
| HHPA➣Health, Human Performance and Athletics (Linfield College; Oregon) |