| ninth | niende |
| Niobe | Niobe |
| niobium | niobium |
| nipple | brystvorte |
| Nipple clamp | Parentes |
| Nippon | Japan |
| Nippy little car | Streaker |
| Nirvana | Nirvana |
| Nisan | Nissan |
| Nisargadatta Maharaj | Sri Nisargadatta Maharaj |
| Nisibis | Akko |
| Nisos | Næse |
| Nisroch | Nisrok |
| Nissan Group | Nissan |
| Nissan Motors | Nissan |
| Nissan River | Nissan |
| Nistru | Dnestr |
| Niteroi | Manaus |
| Niterói | Niteroi |
| nitrate | nitrat |
| Nitrate removal | Denitrifikation |
| Nitric acid | Salpetersyre |
| nitrification | nitrifikation |
| nitro compound | nitroforbindelser |
| Nitro-gliycerin | Nitroglycerin |
| nitrogen | nitrogen |
| nitrogen cycle | nitrogenkredsløb |
| nitrogen dioxide | kvælstofdioxyd |
| nitrogen fixation | kvælstofbinding |
| nitrogen monoxide | nitrogenmonoxyd |
| nitrogen oxide | nitrogenoxid |
| nitrogen oxides | kvælstofilter |
| Nitrogen triiodide | Nitrogentriiodid |
| nitrogenous fertiliser | nitrogenholdigt gødningsstof |
| Nitroglycerin | Nitroglycerin |
| Nitroguanidine | Nitroguanidin |
| nitrosamine | nitrosamin |
| Niue | Niue |
| Nivå | Nivå |
| Nix | Nix |
| Nixon Doctrine | Nixondoktrinen |
| Nizaris | Assassinersekten |
| Nizhni Novgorod | Nizjnij Novgorod |
| Nizhny Novgorod | Nizjnij Novgorod |
| Nièvre | Nièvre |
| Niðavellir | Svartalfheim |
| Niš | Niš |
| Njord | Njord |
| Njörðr | Njord |
| NK Dinamo Zagreb | Dinamo Zagreb |
| NK Osijek | Osijek |
| NK Rijeka | Rijeka |
| NK Zagreb | Zagreb |
| NKVD | NKVD |
| NME | NME |
| NMR spectroscopy | NMR spektroskopi |
| no | ikke |
| no doubt | uden tvivl |
| no smoking | røgning forbudt |
