United Kingdom of Great Britain and Northern Ireland vs British Cabinet

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	British Cabinet (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	the senior ministers of the British government