| Acronym | Definition |
|---|
| H&H➣Hemoglobin and Hematocrit (medicine) |
| H&H➣Hydrology and Hydraulics (USACE) |
| H&H➣Hot and Heavy |
| H&H➣Hematocrit and Hemoglobin |
| H&H➣Holland and Holland (firearms manufacturer) |
| H&H➣Handel & Haydn Society (since 1815) |
| H&H➣Hurt & Heal (gaming) |
| H&H➣Holland and Hart LLP (law firm) |