PREPREGS is a playable word

prepreg Scrabble® Dictionary

noun
pl. prepregs
reinforcing material already impregnated with a synthetic resin
63 Playable Words can be made from "PREPREGS"
   2-Letter Words (4 found)
   3-Letter Words (17 found)
   6-Letter Words (2 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)