UNLOOSEN is a playable word

unloosen Scrabble® Dictionary

verb
unloosened, unloosening, unloosens
to unloose
95 Playable Words can be made from "UNLOOSEN"
   2-Letter Words (13 found)
   3-Letter Words (25 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)