DOUBTFUL is a playable word

doubtful Scrabble® Dictionary

adjective
uncertain
52 Playable Words can be made from "DOUBTFUL"
   2-Letter Words (7 found)
   3-Letter Words (24 found)
   4-Letter Words (16 found)
   5-Letter Words (3 found)
   6-Letter Words (1 found)
   8-Letter Words (1 found)