UNSTOPPING is a playable word

unstop Scrabble® Dictionary

verb
unstopped, unstopping, unstops
to remove a stopper from
294 Playable Words can be made from "UNSTOPPING"
   2-Letter Words (21 found)
   8-Letter Words (6 found)
   9-Letter Words (1 found)
   10-Letter Words (1 found)