Answer:

plateau

Answer	Crossword Clue
PLATEAU	Elevated land expanse
PLATEAU	Level of accomplishment
PLATEAU	Level off

PLATEAU	Large mesa
PLATEAU	Flat highland
PLATEAU	Leveling-off place
PLATEAU	Level of achievement
PLATEAU	It's on the level
PLATEAU	High ground of a sort
PLATEAU	High point
PLATEAU	No-growth state

PLATEAU	Tableland
PLATEAU	Mesa relative
PLATEAU	What Quito is built on.
PLATEAU	Tableland.
PLATEAU	Level reached by quiz contestant.
PLATEAU	Geographical feature.
PLATEAU	Geographic feature.
PLATEAU	Level area

PLATEAU	Period of little change
PLATEAU	Piedmont ..., area of Georgia
PLATEAU	Ky.'s Pennyroyal, e.g.
PLATEAU	Steady high
PLATEAU	Flat part of a chart line
PLATEAU	Stop getting better
PLATEAU	High level
PLATEAU	Stop getting any higher

PLATEAU	Neither improve nor decline
PLATEAU	Period of no progress
PLATEAU	Leveling-off point
PLATEAU	Something to reach
PLATEAU	Leveling off time
PLATEAU	Height
PLATEAU	Flatten out
PLATEAU	Level off at a higher point

PLATEAU	Reach a point of diminishing returns
PLATEAU	The highest form of flattery?