bunfight vs United Kingdom of Great Britain and Northern Ireland

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

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

bunfight (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
(Briticism) a grand formal party on an important occasion	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