United Kingdom of Great Britain and Northern Ireland vs privy council

United Kingdom of Great Britain and Northern Ireland and privy council both are nouns.

Word	Noun	Adjective	Verb	Adverb
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No
privy council	Yes	No	No	No

United Kingdom of Great Britain and Northern Ireland (noun)	privy council (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	an advisory council to a ruler (especially to the British Crown)