Great Britain vs mews

Great Britain and mews both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
mews	Yes	No	No	No

Great Britain (noun)	mews (noun)
an island comprising England and Scotland and Wales	street lined with buildings that were originally private stables but have been remodeled as dwellings
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