British Cabinet vs Britain

British Cabinet and Britain both are nouns.

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

British Cabinet (noun)	Britain (noun)
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