BLOCKER is a playable word

blocker Scrabble® Dictionary

noun
pl. blockers
one that blocks
68 Playable Words can be made from "BLOCKER"
   2-Letter Words (9 found)
   3-Letter Words (23 found)
   5-Letter Words (9 found)
   6-Letter Words (3 found)
   7-Letter Words (1 found)