What is another word for "plateau"?

Roget's Thesaurus (1911) lists these synonyms for "plateau": accubation, accumbent, alkali, all, alluvial, area, azimuth, back, basin, beam, billiard, bowling, bush, butte, calm, campagna, campestral, campestrian, champaign, common, couch, couchant, country, cricket, croquet, dead, decumbence, decumbency, decumbent, desert, discumbency, down, esplanade, estrade, even, face, fell, field, flat, flatness.