Christmas cake vs United Kingdom of Great Britain and Northern Ireland

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

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

Christmas cake (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
a rich fruitcake (usually covered with icing and marzipan) and eaten at Christmas	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