UK vs mug

UK and mug both are nouns.

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

UK (noun)	mug (noun)
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	with handle and usually cylindrical
	the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)
	a person who is gullible and easy to take advantage of
	the quantity that can be held in a mug

UK (verb)	mug (verb)
	To stare awkwardly
	rob at gunpoint or with the threat of violence