| FNF | F***ing No Fun 
| Others |
| FNF | Fa Naker Fanny
| Others |
| FNF | Faith No Fear
| Others |
| FNF | Family No Friends
| Others |
| FNF | Fastest Node First
| Others |
| FNF | FEM Neutral Format
| Others |
| FNF | Fiber Network Fabric
| Others |
| FNF | Fidelity National Financial
| Others |
| FNF | Fight No Further
| Others |
| FNF | File Not Found
| Others |
| FNF | Film Noir Foundation
| Others |
| FNF | Financial Need Form
| Others |
| FNF | first and fifteenth
| Others |
| FNF | First Name First
| Others |
| FNF | Fixed and Furious
| Others |
| FNF | Flag Nor Fail
| Others |
| FNF | Florida Nurses Foundation
| Others |
| FNF | fly and fresh
| Others |
| FNF | Fool N Final
| Others |
| FNF | Forgiven Not Forgotten
| Others |
| FNF | Fred N Fish
| Others |
| FNF | Free Network Foundation
| Others |
| FNF | Fremont National Forest
| Others |
| FNF | Fresh Not Fly
| Others |
| FNF | Friday Night Fever
| Others |
| FNF | Friday Night Fights
| Others |
| FNF | Friday Night Firefight
| Others |
| FNF | Friday night fleurs
| Others |
| FNF | Friday Night Football
| Others |
| FNF | Friday Night Funkin
| Others |
| FNF | Friday Nite Flix
| Others |
| FNF | Friedrich Naumann Foundation
| Others |
| FnF | Friends and Family
| Others |
| FNF | Function Not Form
| Others |
| FNF | Funda Nathi Fund
| Others |