Great Britain vs pork butcher

Great Britain and pork butcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
pork butcher	Yes	No	No	No

Great Britain (noun)	pork butcher (noun)
an island comprising England and Scotland and Wales	a vendor of pork and products made from pork
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