PLATEAU is a playable word

plateau Scrabble® Dictionary

noun
pl. plateaus or plateaux
a level stretch of elevated land
verb
plateaued, plateauing, plateaus
to reach a period or condition of stability
84 Playable Words can be made from "PLATEAU"
   2-Letter Words (13 found)
   3-Letter Words (30 found)
   5-Letter Words (13 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)