sell-by date vs Great Britain

sell-by date and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
sell-by date	Yes	No	No	No
Great Britain	Yes	No	No	No

sell-by date (noun)	Great Britain (noun)
a date stamped on perishable produce indicating the date by which it should be sold	an island comprising England and Scotland and Wales
	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