shovel board vs Great Britain

shovel board and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
shovel board	Yes	No	No	No
Great Britain	Yes	No	No	No

shovel board (noun)	Great Britain (noun)
a game in which coins or discs are slid by hand across a board toward a mark	an island comprising England and Scotland and Wales
	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