| Acronym | Definition |
|---|
| IHHA➣Irish Hard of Hearing Association |
| IHHA➣International Heavy Haul Association |
| IHHA➣Indian Heritage Hotels Association |
| IHHA➣Indiana Hospital and Health Association |
| IHHA➣Illinois Hospital and HealthSystems Association |
| IHHA➣International Holistic Health Association |
| IHHA➣Initial Health Hazard Analysis |
| IHHA➣Illinois Harness Horsemens Association |