| Acronym | Definition |
|---|
| FENA➣Federación Ecuatoriana de Natación (Spanish: Ecuadorian Swimming Federation) |
| FENA➣Fractional Excretion of Sodium |
| FENA➣Furukawa Electric North America (now American Furukawa Inc.; Plymouth, MI) |
| FENA➣Ferguson Enthusiasts of North America |
| FENA➣Florida Emergency Nurses Association |
| FENA➣Center on Functional Engineered and Nano Architectonics (research institute; est. 2003; University of California, Los Angeles) |
| FENA➣Far East News Agency |
| FENA➣Future Enterprise Network Architecture |