United Kingdom of Great Britain and Northern Ireland vs nark

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	nark (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	an informer or spy working for the police
	a lawman concerned with narcotics violations

United Kingdom of Great Britain and Northern Ireland (verb)	nark (verb)
	inform or spy (for the police)
	cause annoyance in; disturb, especially by minor irritations