DEADLOCK is a playable word

deadlock Scrabble® Dictionary

verb
deadlocked, deadlocking, deadlocks
to come to a standstill
120 Playable Words can be made from "DEADLOCK"
   2-Letter Words (14 found)
   6-Letter Words (8 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)