Great Britain vs minicar

Great Britain and minicar both are nouns.

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

Great Britain (noun)	minicar (noun)
an island comprising England and Scotland and Wales	a car that is even smaller than a subcompact car
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