- nasopalatine duct cyst
- nasopharyngeal angiofibroma , NAF
- nasopharyngeal carcinoma , NPC
- nasal trumpet
- nasopharyngeal airway , NPA
- nose hose
- nasopharyngeal abscess
- Nassach
- Nastaetten
- Nat Tate. An American Artist
- Natal deepsea lobster
- Natal spiny lobster
- natalizumab
- natalyite
- natymycin
- Natchitoches
- Nathan the Wise
- Natick
- National Basketball Association, NBA
- National City
- National Football League, NFL
- National Geospatial-Intelligence Agency , NGA
- NIOSH
- National Oceanic and Atmospheric Administration , NOAA
- National Rifle Association , NRA
- National Weather Service , NWS
- National Archives
- National Society for the Prevention of Cruelty to Children, NSPCC
- National Coordination Body for Democratic Change
- National Coordination Committee for Democratic Change
- national seashores
- national mentality
- National Breastfeeding Committee
- national syndicalism
- national tourism
- national committee , NC
- National Olympic Committee for Germany
- National Olympic Committee , NOC
- national identity
