skidpan vs United Kingdom of Great Britain and Northern Ireland

skidpan and United Kingdom of Great Britain and Northern Ireland both are nouns.

Word	Noun	Adjective	Verb	Adverb
skidpan	Yes	No	No	No
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No

skidpan (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
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