United Kingdom of Great Britain and Northern Ireland vs roly-poly pudding

United Kingdom of Great Britain and Northern Ireland and roly-poly pudding both are nouns.

Word	Noun	Adjective	Verb	Adverb
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No
roly-poly pudding	Yes	No	No	No

United Kingdom of Great Britain and Northern Ireland (noun)	roly-poly pudding (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	pudding made of suet pastry spread with jam or fruit and rolled up and baked or steamed