Answer: plateaus

AnswerCrossword Clue
PLATEAUSFlat dishes, as for tea service
plateausDenoting a group of American Indian peoples of the plateau country of western Canada and the US, including the Nez PercÚ
plateausA state of little or no change following a period of activity or progress
plateausPLATEAU, to reach a period of stability
plateausAn area of relatively level high ground
PLATEAUSAttainment levels
PLATEAUSAchievement levels
PLATEAUSStarts to stagnate
PLATEAUSHigh spots
PLATEAUSLevels off
PLATEAUSMesas
PLATEAUSFlat extents in a graph.
PLATEAUSReaches one's limit
PLATEAUSTablelands
PLATEAUSFlattens
PLATEAUSFlattens out
PLATEAUSGrand Canyon vistas