Great Britain vs refresher

Great Britain and refresher both are nouns.

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

Great Britain (noun)	refresher (noun)
an island comprising England and Scotland and Wales	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