Great Britain vs mod con

Great Britain and mod con both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
mod con	Yes	No	No	No

Great Britain (noun)	mod con (noun)
an island comprising England and Scotland and Wales	modern convenience; the appliances and conveniences characteristic of a modern house
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