UNDERDO is a playable word

underdo Scrabble® Dictionary

verb
underdid, underdone, underdoing, underdoes
to do insufficiently
88 Playable Words can be made from "UNDERDO"
   2-Letter Words (14 found)
   3-Letter Words (27 found)
   5-Letter Words (11 found)
   6-Letter Words (5 found)
   7-Letter Words (3 found)