MULLING is a playable word

mull Scrabble® Dictionary

verb
mulled, mulling, mulls
to ponder
44 Playable Words can be made from "MULLING"
   2-Letter Words (8 found)
   3-Letter Words (18 found)
   4-Letter Words (14 found)
   5-Letter Words (2 found)
   6-Letter Words (1 found)
   7-Letter Words (1 found)