Lords Spiritual vs Great Britain

Lords Spiritual and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lords Spiritual	Yes	No	No	No
Great Britain	Yes	No	No	No

Lords Spiritual (noun)	Great Britain (noun)
the clergy in France and the heads of the church in Britain	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