Synonyms for Plateau:

n.

push, come to, enter, hill, overtake, run, fulfill, come, elevation, touch, attain. intermission, grade, cooling-off period, recess, pause, halt, step, interruption, delay, rung, degree, break, interval, interlude. the mainland, swathe, land mass, swath, subcontinent, sweep. extent (noun)
territory, dimension, extent, area, scale, space, stretch, region, plane, length, zone, leeway, reach, field, neighborhood, volume, room, span, acreage, scope, range, measure.
level; flat, often high, land (noun)
tableland, mesa, plain, elevation.
object (noun)
tableland.
plateau (noun)
tableland.
prairie (noun)
moor, flatness, veld, savanna, prairie, heath, tundra, pampas, desert, steppe, countryside, champaign, plain, mesa.
table (noun)
tableland.

Other synonyms:

subcontinent, the mainland, land mass. swathe, swath. Other relevant words:
swathe, intermission, break, step, recess, degree, rung, subcontinent, tableland, grade, interruption, interval, pause, interlude, elevation.

Usage examples for plateau

  1. Presently we arrived at the eastern edge of the ridge, and about five miles away, and 1, 000 feet below the high plateau on which we stood, we distinguished the valley of Imrera! – How I Found Livingstone by Sir Henry M. Stanley
  2. Keep sharp eyes, the plateau may be occupied. – Princess Maritza by Percy Brebner
  3. At last they reached the ridge of the elevation up which they had been climbing, and found themselves on the margin of a plateau or rather valley, beyond which rose the rugged, precipitous Ozarks. – The Hunters of the Ozark by Edward S. Ellis