9 letters
- silentest11
- siltstone11
- simpleton17
- singleton14
- skeletons15
- skepsises16
- sleepiest13
- sleepings16
- slipknots18
- slipsoles14
- sloppiest16
- sloshiest12
- slynesses13
- snideness12
- snoopiest13
- snowiness14
- soapiness13
- solanines12
- solecises13
- solecists13
- solemnest14
- solidness12
- solipsist13
- solstices13
- sootiness10
- soppiness16
- spiceless16
- spikelets17
- spineless14
- spinelles15
- spininess14
- spinneret14
- spinsters13
- spinulose15
- splendent16
- splenetic17
- splinters14
- spoilsmen17
- spoliates13
- spongiest15
- sponsions14
- spooniest13
- stainless11
- staleness11
- steapsins13
- steepness13
- stenokies14
- sternness11
- sternsons11
- stilbenes14
- stillness12
- stingless13
- stoniness11
- stonishes12
- stypsises14
- sunstones12
- suspenses14
- sweetsops15
- synesises12
- syntonies13
- tapelines14
- tenseness11
- tensional12
- tensioned12
- tensioner11
- teosintes10
- tepidness14
- terpineol14
- terpinols14
- testiness10
- tholepins16
- tinstones11
- tipsiness13
- witnesses13