OCTADIC is a playable word

octad Scrabble® Dictionary

noun
pl. octads
a group of eight
(adjective) octadic
57 Playable Words can be made from "OCTADIC"
   2-Letter Words (12 found)
   3-Letter Words (18 found)
   4-Letter Words (17 found)
   5-Letter Words (6 found)
   6-Letter Words (2 found)
   7-Letter Words (2 found)