United Kingdom vs parliament

United Kingdom and parliament both are nouns.

Word	Noun	Adjective	Verb	Adverb
United Kingdom	Yes	No	No	No
parliament	Yes	No	No	No

United Kingdom (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