UNJAM is a playable word

unjam Scrabble® Dictionary

verb
unjammed, unjamming, unjams
to undo things tightly crammed together
16 Playable Words can be made from "UNJAM"
   2-Letter Words (8 found)
   3-Letter Words (6 found)
   4-Letter Words (1 found)
   5-Letter Words (1 found)