Great Britain vs skidpan

Great Britain and skidpan both are nouns.

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

Great Britain (noun)	skidpan (noun)
an island comprising England and Scotland and Wales	a paved surface on which cars can be made to skid so that drivers can practice controlling them
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