Great Britain vs shovel board

Great Britain and shovel board both are nouns.

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

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