Mongolia
noun: Mongolian(s)
adjective: Mongolian

Montserrat
noun: Montserratian(s)
adjective: Montserratian

Morocco
noun: Moroccan(s)
adjective: Moroccan

Mozambique
noun: Mozambican(s)
adjective: Mozambican

Namibia
noun: Namibian(s)
adjective: Namibian

Nauru
noun: Nauruan(s)
adjective: Nauruan

Nepal
noun: Nepalese (singular and plural)
adjective: Nepalese

Netherlands
noun: Dutchman(men), Dutchwoman(women)
adjective: Dutch

Netherlands Antilles
noun: Dutch Antillean(s)
adjective: Dutch Antillean

New Caledonia
noun: New Caledonian(s)
adjective: New Caledonian