Great Britain vs scullery

Great Britain and scullery both are nouns.

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

Great Britain (noun)	scullery (noun)
an island comprising England and Scotland and Wales	a small room (in large old British houses) next to the kitchen; where kitchen utensils are cleaned and kept and other rough household jobs are done
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