privy council vs United Kingdom of Great Britain and Northern Ireland

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

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

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