UNDID is a playable word

undo Scrabble® Dictionary

verb
undid, undone, undoing, undoes
to bring to ruin
noun
pl. undos
a computer feature that allows the user to reverse the effect of the last action
11 Playable Words can be made from "UNDID"
   2-Letter Words (4 found)
   3-Letter Words (6 found)
   5-Letter Words (1 found)