KEESTER is a playable word

keester Scrabble® Dictionary

noun
pl. keesters
keister
54 Playable Words can be made from "KEESTER"
   2-Letter Words (5 found)
   3-Letter Words (14 found)
   4-Letter Words (15 found)
   6-Letter Words (3 found)
   7-Letter Words (2 found)