CUBOIDAL is a playable word

cuboid Scrabble® Dictionary

noun
pl. cuboids
a bone of the foot
(adjective) cuboidal
121 Playable Words can be made from "CUBOIDAL"
   2-Letter Words (15 found)
   6-Letter Words (2 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)