THWACKS is a playable word

thwack Scrabble® Dictionary

verb
thwacked, thwacking, thwacks
to strike with something flat
90 Playable Words can be made from "THWACKS"
   2-Letter Words (8 found)
   3-Letter Words (25 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)