| Abbreviation | Definition |
|---|---|
| NFFF | National Fallen Firefighters Foundation |
| NFFR | National Foundation for Fertility Research |
| NFID | National Foundation for Infectious Diseases |
| NFIE | Naqshbandiya Foundation for Islamic Education |
| NFIE | National Foundation for Improvement of Education |
| NFLF | National Financial Literacy Foundation |
| NFLF | National Football League Foundation |
| NFLF | Ninjas Fighting Lymphedema Foundation |
| NFLF | Nutrients for Life Foundation |
| NFLR | National Foundation for Liver Research |
| NFLR | National Foundation of Liver Research |
| NFND | National Foundation for Neuromuscular Diseases |
| NFOM | Nigerian Foundation Of Michigan |
| NFPC | Navy Foundation Pune Chapter |
| NFPE | Novato Foundation for Public Education |
| NFRA | National Foundation Repair Association |
| NFSS | National Foundation Skills Strategy |
| NFT | Network Foundation Technologies |
| NFTE | National Foundation for Teaching Entrepreneurship |
| NFTL | New Foundations Transitional Living |