SLITLESS is a playable word

slitless Scrabble® Dictionary

adjective
having no slits
88 Playable Words can be made from "SLITLESS"
   2-Letter Words (9 found)
   3-Letter Words (21 found)
   6-Letter Words (8 found)
   7-Letter Words (1 found)
   8-Letter Words (2 found)