threepence vs United Kingdom of Great Britain and Northern Ireland

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

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

threepence (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
former cupronickel coin of the United Kingdom equal to three pennies	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