footplate vs Great Britain

footplate and Great Britain both are nouns.

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

footplate (noun)	Great Britain (noun)
the platform in the cab of a locomotive on which the engineer stands to operate the controls	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