Caucasus vs Circassian

Caucasus and Circassian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Caucasus	Yes	No	No	No
Circassian	Yes	No	No	No

Caucasus (noun)	Circassian (noun)
a large region between the Black and Caspian seas that contains the Caucasus Mountains; oil is its major resource	a northern Caucasian language spoken by the Circassian
the mountain range in Caucasia between the Black Sea and the Caspian Sea that forms part of the traditional border between Europe and Asia	a mostly Sunni Muslim community living in northwestern Caucasia
	a member of the Sunni Muslim people living in northwestern Caucasia