cantankerous vs United Kingdom of Great Britain and Northern Ireland

cantankerous is not a noun while United Kingdom of Great Britain and Northern Ireland is a noun.

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

cantankerous (noun)	United Kingdom of Great Britain and Northern Ireland (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

cantankerous (adjective)	United Kingdom of Great Britain and Northern Ireland (adjective)
having a difficult and contrary disposition
stubbornly obstructive and unwilling to cooperate