word | | Nationality |
| adjective | Monaco | noun: Monegasque(s) or Monacan(s) adjective: Monegasque or Monacan |
| adjective | Mongolia | noun: Mongolian(s) adjective: Mongolian |
| adjective | Montenegro | noun: Montenegrin(s) adjective: Montenegrin |
| adjective | Montserrat | noun: Montserratian(s) adjective: Montserratian |
| adjective | Morocco | noun: Moroccan(s) adjective: Moroccan |
| adjective | Mozambique | noun: Mozambican(s) adjective: Mozambican |
| adjective | Namibia | noun: Namibian(s) adjective: Namibian |
| adjective | Nauru | noun: Nauruan(s) adjective: Nauruan |
| adjective | Nepal | noun: Nepali (singular and plural) adjective: Nepali |
| adjective | Netherlands | noun: Dutchman(men), Dutchwoman(women) adjective: Dutch |
| adjective | New Caledonia | noun: New Caledonian(s) adjective: New Caledonian |
| adjective | New Zealand | noun: New Zealander(s) adjective: New Zealand |
| adjective | Nicaragua | noun: Nicaraguan(s) adjective: Nicaraguan |
| adjective | Niger | noun: Nigerien(s) adjective: Nigerien |
| adjective | Nigeria | noun: Nigerian(s) adjective: Nigerian |
| adjective | Niue | noun: Niuean(s) adjective: Niuean |
| adjective | Norfolk Island | noun: Norfolk Islander(s) adjective: Norfolk Islander(s) |