DUMFOUNDED is a playable word

dumfound Scrabble® Dictionary

verb
dumfounded, dumfounding, dumfounds
to astonish
108 Playable Words can be made from "DUMFOUNDED"
   2-Letter Words (20 found)
   5-Letter Words (11 found)
   6-Letter Words (8 found)
   7-Letter Words (3 found)
   8-Letter Words (2 found)
   10-Letter Words (1 found)