United Kingdom of Great Britain and Northern Ireland vs Lords Spiritual

United Kingdom of Great Britain and Northern Ireland and Lords Spiritual both are nouns.

Word	Noun	Adjective	Verb	Adverb
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No
Lords Spiritual	Yes	No	No	No

United Kingdom of Great Britain and Northern Ireland (noun)	Lords Spiritual (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	the clergy in France and the heads of the church in Britain