STADIA is a playable word

stadia Scrabble® Dictionary

noun
pl. stadias
a method of surveying distances
45 Playable Words can be made from "STADIA"
   2-Letter Words (12 found)
   3-Letter Words (17 found)
   4-Letter Words (11 found)
   5-Letter Words (4 found)
   6-Letter Words (1 found)