| Meaning | Category |
| National Rap League | Miscellaneous->Funnies |
| National Rugby League | Community->Sports |
| Naval Research Laboratory | Academic & Science->Meteorology Governmental->Military Governmental->NASA Academic & Science->Ocean Science Governmental->US Government |
| North Ronaldsay, England, UK | Regional->Airport Codes |
| Nuclear Referral List | Business->International Business |
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