- national association of realtors
- national association of securities dealers automated quotations
- national bank
- national baseball hall of fame
- national capital
- national censorship
- national climatic data center
- national debt
- national debt ceiling
- national flag
- national geospatial-intelligence agency
- national guard
- national guard bureau
- national holiday
- national income
- national institute of justice
- national institute of standards and technology
- national institutes of health
- national insurance
- national intelligence community
- national labor relations board
- national leader
- national liberation army
- national liberation front of corsica
- national library of medicine
- national monument
- national oceanic and atmospheric administration
- national park
- national park service
- national reconnaissance office
- national rifle association
- national science foundation
- national security agency
- national security council
- national service
- national socialism
- national socialist
- national socialist german workers' party
- national technical information service
- national trading policy
- national trust
- national volunteers association
- national weather service
- nationalisation
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- nationalism
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- nationalist leader
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- nationality
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- nationally
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- native
- native alaskan
- native american
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- native bear
- native beech
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- native cranberry
- native fuchsia
- native hawaiian
- native holly
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- native language
- native orange
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- native speaker
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- natterjack
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- natural childbirth
- natural covering
- natural depression
- natural elevation
- natural enclosure
- natural endowment
- natural event
- natural family planning
- natural fiber
- natural fibre
- natural gas
- natural glass
- natural history
- natural immunity
- natural language
- natural language processing
- natural language processing application
- natural language processor
- natural law
- natural logarithm
- natural number
- natural object
- natural order
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- natural philosophy
- natural process
- natural resin
- natural resource
- natural resources
- natural rubber
- natural science
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- nature study
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- naturopathy
- nauch
- nauclea
- nauclea diderrichii
- naucrates
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- naught
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- naumachia
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- nauru
- nauru island
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- nausea
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- nauseating
- nauseatingness
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- naut mi
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- nautch dance
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- nautical chain
- nautical linear unit
- nautical mile
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- nautilidae
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- navaho
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- naval
- naval academy
- naval air warfare center weapons division
- naval attache
- naval battle
- naval blockade
- naval brass
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