Cascades vs Cascade Mountains

Cascades and Cascade Mountains both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cascades	Yes	No	No	No
Cascade Mountains	Yes	No	No	No

As nouns, Cascades and Cascade Mountains are synonyms defined as:

Cascades and Cascade Mountains: a mountain range in the northwestern United States extending through Washington and Oregon and northern California; a part of the Coast Range

Other synonyms of Cascades include Cascade Range.

Cascades (noun)	Cascade Mountains (noun)
a mountain range in the northwestern United States extending through Washington and Oregon and northern California; a part of the Coast Range	a mountain range in the northwestern United States extending through Washington and Oregon and northern California; a part of the Coast Range