United Kingdom of Great Britain and Northern Ireland vs stockbroker belt

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	stockbroker belt (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 wealthy residential suburb