Great Britain vs Maundy money

Great Britain and Maundy money both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
Maundy money	Yes	No	No	No

Great Britain (noun)	Maundy money (noun)
an island comprising England and Scotland and Wales	specially minted silver coins that are distributed by the British sovereign on Maundy Thursday
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