UNBOLT is a playable word

unbolt Scrabble® Dictionary

verb
unbolted, unbolting, unbolts
to open by withdrawing a bolt (a metal bar)
33 Playable Words can be made from "UNBOLT"
   2-Letter Words (8 found)
   3-Letter Words (14 found)
   4-Letter Words (8 found)
   5-Letter Words (2 found)
   6-Letter Words (1 found)