parliamentary agent vs Great Britain

parliamentary agent and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
parliamentary agent	Yes	No	No	No
Great Britain	Yes	No	No	No

parliamentary agent (noun)	Great Britain (noun)
a person who is employed to look after the affairs of businesses that are affected by legislation of the British Parliament	an island comprising England and Scotland and Wales
	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