Encyclopedias, Almanacs, Transcripts, and Maps
- nitrile
- nitro group
- nitrogen mustard
- nitrogen-fixing bacteria
- Nitti, Francesco Saverio
- Nivelle, Robert Georges
- Nivelles
- Nivernais
- Niyazov, Saparmurat
- Nizam
- Nizamabad
- Nizhnevartovsk
- Nizhni Tagil
- Nizhny Novgorod
- Nizhyn
- Nkurunziza, Pierre
- NMR
- no-see-um
- Noailles, Adrien Maurice, duc de
- Noailles, Anna Élisabeth de Brancovan, comtesse de