| Abbreviation | Definition |
|---|---|
| NSA | Natsionalna Sportna Akademija |
| NSAA | National Ski Areas Association |
| NSB | National Science Bowl |
| NSBL | North Shore Baseball League |
| NSC | Nanaimo Skating Club |
| NSC | National Ski Council |
| NSC | National Sports Center |
| NSCA | National Strength And Conditioning Association |
| NSCC | Northwest Ski Club Council |
| NSCD | National Sports Center for the |
| NSCF | Nordic Ski Club of Fairbanks |
| NSCI | National Sports Club of India |
| NSFA | Nassau Sport Fishing Association |
| NSFL | Nassau Suffolk Football League |
| NSH | Nashville Predators |
| NSH | National Horse Show Association |
| NSH | National Show Horse |
| NSHA | National Horse Show Association |
| NSHA | Nevada State Horsemans Association |
| NSI | Nail Systems Icn |