U.K. vs parliamentary agent

U.K. and parliamentary agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
U.K.	Yes	No	No	No
parliamentary agent	Yes	No	No	No

U.K. (noun)	parliamentary agent (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 person who is employed to look after the affairs of businesses that are affected by legislation of the British Parliament