United Kingdom of Great Britain and Northern Ireland vs pot plant

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

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

United Kingdom of Great Britain and Northern Ireland (noun)	pot plant (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	a plant suitable for growing in a flowerpot (especially indoors)