PERIDIUM is a playable word

peridium Scrabble® Dictionary

noun
pl. peridia
the covering of the spore-bearing organ in many fungi
(adjective) peridial
108 Playable Words can be made from "PERIDIUM"
   2-Letter Words (13 found)
   6-Letter Words (6 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)