DUNGEON is a playable word

dungeon Scrabble® Dictionary

verb
dungeoned, dungeoning, dungeons
to confine in a dungeon (an underground prison)
60 Playable Words can be made from "DUNGEON"
   2-Letter Words (12 found)
   3-Letter Words (26 found)
   4-Letter Words (16 found)
   5-Letter Words (2 found)
   6-Letter Words (3 found)
   7-Letter Words (1 found)