REPEATER is a playable word

repeater Scrabble® Dictionary

noun
pl. repeaters
one that repeats
95 Playable Words can be made from "REPEATER"
   2-Letter Words (10 found)
   3-Letter Words (27 found)
   6-Letter Words (10 found)
   7-Letter Words (2 found)
   8-Letter Words (3 found)