United Kingdom of Great Britain and Northern Ireland vs afternoon tea

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	afternoon tea (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	a light midafternoon meal of tea and sandwiches or cakes