Ozark Mountains vs Ozarks

Ozark Mountains and Ozarks both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ozark Mountains	Yes	No	No	No
Ozarks	Yes	No	No	No

As nouns, Ozark Mountains and Ozarks are synonyms defined as:

Ozark Mountains and Ozarks: an area of low mountains in northwestern Arkansas and southeastern Missouri and northeastern Oklahoma

Other synonyms of Ozark Mountains include Ozark Plateau.

Ozark Mountains (noun)	Ozarks (noun)
an area of low mountains in northwestern Arkansas and southeastern Missouri and northeastern Oklahoma	an area of low mountains in northwestern Arkansas and southeastern Missouri and northeastern Oklahoma