redcap vs United Kingdom of Great Britain and Northern Ireland

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

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

redcap (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
a porter who helps passengers with their baggage at a railroad station	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
a member of the military police in Britain