Ozark Plateau vs Ozarks

Ozark Plateau and Ozarks both are nouns.

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

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

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

Other synonyms of Ozark Plateau include Ozark Mountains.

Ozark Plateau (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