BUTTER is a playable word

butter Scrabble® Dictionary

verb
buttered, buttering, butters
to spread with butter (a milk product)
33 Playable Words can be made from "BUTTER"
   2-Letter Words (6 found)
   3-Letter Words (13 found)
   4-Letter Words (7 found)
   5-Letter Words (6 found)
   6-Letter Words (1 found)