Great Britain vs skivvy

Great Britain and skivvy both are nouns.

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

Great Britain (noun)	skivvy (noun)
an island comprising England and Scotland and Wales	a female domestic servant who does all kinds of menial work
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