UK vs parliament

UK and parliament both are nouns.

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

UK (noun)	parliament (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 card game in which you play your sevens and other cards in sequence in the same suit as the sevens; you win if you are the first to use all your cards
	a legislative assembly in certain countries