refresher vs UK

refresher and UK both are nouns.

Word	Noun	Adjective	Verb	Adverb
refresher	Yes	No	No	No
UK	Yes	No	No	No

refresher (noun)	UK (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