MUSCLE is a playable word

muscle Scrabble® Dictionary

verb
muscled, muscling, muscles
to proceed by force
46 Playable Words can be made from "MUSCLE"
   2-Letter Words (7 found)
   3-Letter Words (18 found)
   4-Letter Words (16 found)
   5-Letter Words (4 found)
   6-Letter Words (1 found)