Home Counties vs United Kingdom of Great Britain and Northern Ireland

Home Counties and United Kingdom of Great Britain and Northern Ireland both are nouns.

Word	Noun	Adjective	Verb	Adverb
Home Counties	Yes	No	No	No
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No

Home Counties (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
the English counties surrounding London into which Greater London has expanded	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