nan vs Great Britain

nan and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
nan	Yes	No	No	No
Great Britain	Yes	No	No	No

nan (noun)	Great Britain (noun)
leavened bread baked in a clay oven in India; usually shaped like a teardrop	an island comprising England and Scotland and Wales
your grandmother	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
the mother of your father or mother