Great Britain vs Devonshire cream

Great Britain and Devonshire cream both are nouns.

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

Great Britain (noun)	Devonshire cream (noun)
an island comprising England and Scotland and Wales	thick cream made from scalded milk
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