THWACK is a playable word

thwack Scrabble® Dictionary

verb
thwacked, thwacking, thwacks
to strike with something flat
32 Playable Words can be made from "THWACK"
   2-Letter Words (6 found)
   3-Letter Words (11 found)
   4-Letter Words (11 found)
   5-Letter Words (3 found)
   6-Letter Words (1 found)