UNDERDID is a playable word

underdo Scrabble® Dictionary

verb
underdid, underdone, underdoing, underdoes
to do insufficiently
81 Playable Words can be made from "UNDERDID"
   2-Letter Words (10 found)
   3-Letter Words (20 found)
   6-Letter Words (8 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)