DUMFOUNDS is a playable word

dumfound Scrabble® Dictionary

verb
dumfounded, dumfounding, dumfounds
to astonish
97 Playable Words can be made from "DUMFOUNDS"
   2-Letter Words (14 found)
   5-Letter Words (13 found)
   6-Letter Words (5 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)