Great Britain vs drained

Great Britain is a noun but drained is not a noun.

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

Great Britain (noun)	drained (noun)
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

Great Britain (adjective)	drained (adjective)
	emptied or exhausted of (as by drawing off e.g. water or other liquid)
	extremely exhausted
	drained of electric charge; discharged