honours list vs United Kingdom of Great Britain and Northern Ireland

honours list and United Kingdom of Great Britain and Northern Ireland both are nouns.

Word	Noun	Adjective	Verb	Adverb
honours list	Yes	No	No	No
United Kingdom of Great Britain and Northern Ireland	Yes	No	No	No

honours list (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
a list issued by examiners that categorizes students according to the class of honours they achieved in their degree examinations	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