stately home vs United Kingdom of Great Britain and Northern Ireland

stately home and United Kingdom of Great Britain and Northern Ireland both are nouns.

Word	Noun	Adjective	Verb	Adverb
stately home	Yes	No	No	No
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No

stately home (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
a mansion that is (or formerly was) occupied by an aristocratic family	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