Great Britain vs Rhenish

Great Britain and Rhenish both are nouns.

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

Great Britain (noun)	Rhenish (noun)
an island comprising England and Scotland and Wales	any of several white wines from the Rhine River valley in Germany (`hock' is British usage)
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)	Rhenish (adjective)
	of or relating to the Rhine River and the lands adjacent to it