UNINSTALLING is a playable word

uninstal Scrabble® Dictionary

verb
uninstalled, uninstalling, uninstals
to remove a file or an application from a computer
439 Playable Words can be made from "UNINSTALLING"
   2-Letter Words (20 found)
   9-Letter Words (6 found)
   10-Letter Words (2 found)
   12-Letter Words (1 found)