COPYBOOK is a playable word

copybook Scrabble® Dictionary

noun
pl. copybooks
a book used in teaching penmanship
35 Playable Words can be made from "COPYBOOK"
   2-Letter Words (7 found)
   3-Letter Words (12 found)
   4-Letter Words (12 found)
   5-Letter Words (3 found)
   8-Letter Words (1 found)