SLEEPER is a playable word

sleeper Scrabble® Dictionary

noun
pl. sleepers
one that sleeps
59 Playable Words can be made from "SLEEPER"
   2-Letter Words (5 found)
   3-Letter Words (14 found)
   4-Letter Words (18 found)
   6-Letter Words (3 found)
   7-Letter Words (2 found)