caster sugar vs United Kingdom of Great Britain and Northern Ireland

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

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

caster sugar (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
very finely granulated sugar that was formerly sprinkled from a castor	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