OVERBOOKS is a playable word

overbook Scrabble® Dictionary

verb
overbooked, overbooking, overbooks
to issue reservations in excess of the space available
104 Playable Words can be made from "OVERBOOKS"
   2-Letter Words (10 found)
   3-Letter Words (25 found)
   6-Letter Words (6 found)
   7-Letter Words (2 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)