workhouse vs United Kingdom of Great Britain and Northern Ireland

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

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

workhouse (noun)	United Kingdom of Great Britain and Northern Ireland (noun)
a county jail that holds prisoners for periods up to 18 months	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 poorhouse where able-bodied poor are compelled to labor