Devonshire cream vs Great Britain

Devonshire cream and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
Devonshire cream	Yes	No	No	No
Great Britain	Yes	No	No	No

Devonshire cream (noun)	Great Britain (noun)
thick cream made from scalded milk	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