Great Britain vs nark

Great Britain and nark both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
nark	Yes	No	Yes	No

Great Britain (noun)	nark (noun)
an island comprising England and Scotland and Wales	an informer or spy working for the police
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	a lawman concerned with narcotics violations

Great Britain (verb)	nark (verb)
	inform or spy (for the police)
	cause annoyance in; disturb, especially by minor irritations