United Kingdom of Great Britain and Northern Ireland vs hall of residence

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	hall of residence (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	a university dormitory