justiciary vs United Kingdom of Great Britain and Northern Ireland

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

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

justiciary (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
the jurisdiction of a justiciar	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
formerly a high judicial officer