According to the CIA factbook listing of current countries there are none.
Nauru starts with N and ends with U. Nauru is an island country in Micronesia.
norm
morgan
It could be multiplication.
moron, melon.
Afghanistan ends with the letter n. Azerbaijan also ends with the letter n.
Nigeria ^^
maturation
moron, minion, mammon, man, mean, mission
Monsoon.
a word that starts with k and ends in n is known
No country begins with N and ends with N.