United Kingdom of Great Britain and Northern Ireland vs nan

United Kingdom of Great Britain and Northern Ireland and nan both are nouns.

Word	Noun	Adjective	Verb	Adverb
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No
nan	Yes	No	No	No

United Kingdom of Great Britain and Northern Ireland (noun)	nan (noun)
a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom	leavened bread baked in a clay oven in India; usually shaped like a teardrop
	your grandmother
	the mother of your father or mother