Caucasus vs chain

Caucasus and chain both are nouns.

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

Caucasus (noun)	chain (noun)
a large region between the Black and Caspian seas that contains the Caucasus Mountains; oil is its major resource	a series of (usually metal) rings or links fitted into one another to make a flexible ligament
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 necklace made by stringing objects together
	anything that acts as a restraint
	a linked or connected series of objects
	a series of things depending on each other as if linked together
	(business) a number of similar establishments (stores or restaurants or banks or hotels or theaters) under one ownership
	(chemistry) a series of linked atoms (generally in an organic molecule)
	a series of hills or mountains
	a unit of length

Caucasus (verb)	chain (verb)
	fasten or secure with chains
	connect or arrange into a chain by linking