United Kingdom of Great Britain and Northern Ireland vs public house

United Kingdom of Great Britain and Northern Ireland and public house both are nouns.

Word	Noun	Adjective	Verb	Adverb
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No
public house	Yes	No	No	No

United Kingdom of Great Britain and Northern Ireland (noun)	public house (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	tavern consisting of a building with a bar and public rooms; often provides light meals