Great Britain vs slop basin

Great Britain and slop basin both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Britain	Yes	No	No	No
slop basin	Yes	No	No	No

Great Britain (noun)	slop basin (noun)
an island comprising England and Scotland and Wales	a bowl into which the dregs of teacups and coffee cups are emptied at the table
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