UNDOS 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
39 Playable Words can be made from "UNDOS"
   2-Letter Words (9 found)
   3-Letter Words (16 found)
   4-Letter Words (10 found)
   5-Letter Words (4 found)