UNDOUBLED is a playable word

undouble Scrabble® Dictionary

verb
undoubled, undoubling, undoubles
to unfold
122 Playable Words can be made from "UNDOUBLED"
   2-Letter Words (15 found)
   6-Letter Words (9 found)
   7-Letter Words (4 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)