refresher vs United Kingdom of Great Britain and Northern Ireland

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

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

refresher (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
a course that reviews and updates a topic for those who have not kept abreast of developments	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 drink that refreshes
a fee (in addition to that marked on the brief) paid to counsel in a case that lasts more than one day