Great Britain vs rota

Great Britain and rota both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
rota	Yes	No	No	No

Great Britain (noun)	rota (noun)
an island comprising England and Scotland and Wales	a roster of names showing the order in which people should perform certain duties
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