shire vs United Kingdom of Great Britain and Northern Ireland

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

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

shire (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
British breed of large heavy draft horse	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
a former administrative district of England; equivalent to a county