SHAMPOOING is a playable word

shampoo Scrabble® Dictionary

verb
shampooed, shampooing, shampoos
to cleanse with a special preparation
427 Playable Words can be made from "SHAMPOOING"
   2-Letter Words (31 found)
   3-Letter Words (106 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)
   10-Letter Words (1 found)