CISSOIDS is a playable word

cissoid Scrabble® Dictionary

noun
pl. cissoids
a type of geometric curve
38 Playable Words can be made from "CISSOIDS"
   2-Letter Words (8 found)
   3-Letter Words (13 found)
   4-Letter Words (9 found)
   5-Letter Words (5 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)