UNBLOCK is a playable word

unblock Scrabble® Dictionary

verb
unblocked, unblocking, unblocks
to free from being blocked
40 Playable Words can be made from "UNBLOCK"
   2-Letter Words (7 found)
   3-Letter Words (10 found)
   4-Letter Words (15 found)
   5-Letter Words (6 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)