Ozark Plateau

geographical name

ˈō-ˌzärk 

variants or Ozark Mountains or the Ozarks

eroded tableland region 1500–2500 feet (457–762 meters) high in the central U.S. north of the Arkansas River in northern Arkansas, southern Missouri, and northeastern Oklahoma with an eastern extension in southern Illinois

Ozarker

ˈō-ˌzär-kər 

noun

Ozarkian

ō-ˈzär-kē-ən 

adjective or noun