| Rank | Abbreviation | Meaning |
|---|
| ***** | FHN | femoral head necrosis
| |
| ***** | FHN | Foreningen for Human Narkotikapolitikk
| |
| **** | FHN | Frequent Hemodialysis Network
| |
| **** | FHN | Federatie Hondensport Nederland
| |
| *** | FHN | Faith and Hunger Network
| |
| *** | FHN | Freeport Health Network
| |
| *** | FHN | Finished Hex Nut
| |
| *** | FHN | Family Housing Navy
| |
| ** | FHN | Forest Hills Northern
| |
| ** | FHN | Future Healthcare Network
| |
| ** | FHN | Family History Negative
| |
| ** | FHN | Fontes Historiae Nubiorum
| |
| * | FHN | femoral head and neck
| |
| * | FHN | Food and Human Nutrition
| |
| * | FHN | Food and Health News
| |
| * | FHN | Family Health Nurse
| |
| * | FHN | First Heli Network
| |
| * | FHN | First Tennessee National Corp (New York Stock Exchange [NYSE])
| |
| * | FHN | family alcoholism history negative
| |
| * | FHN | Forest Health Network
| |
| * | FHN | First Horizon National Corporation
| |
| * | FHN | FIRST HORIZON NTL
| |
| * | FHN | FitzHugh-Nagumo
| |
| * | FHN | Foundation Human Nature
| |
| * | FHN | Family Health Nursing
| |