FLEXING is a playable word

flex Scrabble® Dictionary

verb
flexed, flexing, flexes
to bend
51 Playable Words can be made from "FLEXING"
   2-Letter Words (11 found)
   3-Letter Words (21 found)
   4-Letter Words (13 found)
   5-Letter Words (5 found)
   7-Letter Words (1 found)