Great Britain vs pot plant

Great Britain and pot plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
pot plant	Yes	No	No	No

Great Britain (noun)	pot plant (noun)
an island comprising England and Scotland and Wales	a plant suitable for growing in a flowerpot (especially indoors)
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