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

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

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

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