OIDIOID is a playable word

oidium Scrabble® Dictionary

noun
pl. oidia
a type of fungus
(adjective) oidioid
10 Playable Words can be made from "OIDIOID"
   2-Letter Words (4 found)
   3-Letter Words (2 found)
   4-Letter Words (2 found)
   5-Letter Words (1 found)
   7-Letter Words (1 found)