range of mountains vs chain of mountains

range of mountains and chain of mountains both are nouns.

Word	Noun	Adjective	Verb	Adverb
range of mountains	Yes	No	No	No
chain of mountains	Yes	No	No	No

As nouns, range of mountains and chain of mountains are synonyms defined as:

range of mountains and chain of mountains: a series of hills or mountains

Other synonyms of range of mountains include chain, mountain chain, mountain range, range.

range of mountains (noun)	chain of mountains (noun)
a series of hills or mountains	a series of hills or mountains