| Acronym | Definition |
|---|
| NHHC➣New Hampshire Humanities Council (Concord, NH) |
| NHHC➣National Home Health Care Corp (Scarsdale, NY) |
| NHHC➣New Hampshire Homeschooling Coalition (Concord, NH) |
| NHHC➣National Harness Handicapping Championship (annual) |
| NHHC➣North Houston Heart Center (Spring, TX) |
| NHHC➣Nonketotic Hyperglycemic Hyperosmolar Coma |