bar billiards vs United Kingdom of Great Britain and Northern Ireland

bar billiards and United Kingdom of Great Britain and Northern Ireland both are nouns.

Word	Noun	Adjective	Verb	Adverb
bar billiards	Yes	No	No	No
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No

bar billiards (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
a table game in which short cues are used to knock balls into holes that are guarded by wooden pegs; penalties are incurred if the pegs are knocked over	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