SLOWING is a playable word

slow Scrabble® Dictionary

adjective
slower, slowest
moving with little speed
verb
slowed, slowing, slows
to lessen the speed of
101 Playable Words can be made from "SLOWING"
   2-Letter Words (14 found)
   3-Letter Words (27 found)
   6-Letter Words (6 found)
   7-Letter Words (2 found)