Great Britain vs British Cabinet

Great Britain and British Cabinet both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
British Cabinet	Yes	No	No	No

Great Britain (noun)	British Cabinet (noun)
an island comprising England and Scotland and Wales	the senior ministers of the British government
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