MASSED is a playable word

mass Scrabble® Dictionary

verb
massed, massing, masses
to assemble in a mass (a body of coherent matter)
46 Playable Words can be made from "MASSED"
   2-Letter Words (11 found)
   3-Letter Words (14 found)
   4-Letter Words (14 found)
   5-Letter Words (6 found)
   6-Letter Words (1 found)