SICKNESS is a playable word

sickness Scrabble® Dictionary

noun
pl. sicknesses
the state of being sick
71 Playable Words can be made from "SICKNESS"
   2-Letter Words (7 found)
   3-Letter Words (17 found)
   6-Letter Words (5 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)