Caucasus Mountains vs chain

Caucasus Mountains and chain both are nouns.

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

Caucasus Mountains (noun)	chain (noun)
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 series of (usually metal) rings or links fitted into one another to make a flexible ligament
	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 Mountains (verb)	chain (verb)
	fasten or secure with chains
	connect or arrange into a chain by linking