U.K. vs rave-up

U.K. and rave-up both are nouns.

Word	Noun	Adjective	Verb	Adverb
U.K.	Yes	No	No	No
rave-up	Yes	No	No	No

U.K. (noun)	rave-up (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	a large overnight dance party where electronic music is played and illegal drugs are usually taken
	a raucous gathering