United Kingdom of Great Britain and Northern Ireland vs sell-by date

United Kingdom of Great Britain and Northern Ireland and sell-by date both are nouns.

Word	Noun	Adjective	Verb	Adverb
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No
sell-by date	Yes	No	No	No

United Kingdom of Great Britain and Northern Ireland (noun)	sell-by date (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 date stamped on perishable produce indicating the date by which it should be sold