BACKWASHING is a playable word

backwash Scrabble® Dictionary

verb
backwashed, backwashing, backwashes
to spray water backward
417 Playable Words can be made from "BACKWASHING"
   2-Letter Words (20 found)
   3-Letter Words (79 found)
   9-Letter Words (3 found)
   10-Letter Words (1 found)
   11-Letter Words (1 found)