| Acronym | Definition |
|---|
| NIFL➣National Institute for Literacy |
| NIFL➣Northern Ireland Football League (est. 2013) |
| NIFL➣National Indoor Football League |
| NIFL➣Northern Indiana Fuel and Light (Merrillville, IN) |
| NIFL➣National Independent Football League (est. 2008) |
| NIFL➣Northwest Indiana Federation of Labor (Hammond, IN) |
| NIFL➣Northwest Indiana Football League |