DIOXIDES is a playable word

dioxide Scrabble® Dictionary

noun
pl. dioxides
a type of oxide
80 Playable Words can be made from "DIOXIDES"
   2-Letter Words (15 found)
   3-Letter Words (20 found)
   4-Letter Words (13 found)
   5-Letter Words (12 found)
   7-Letter Words (6 found)
   8-Letter Words (2 found)