9 letters
- snideness12
- snippiest16
- snitchers15
- sophistry16
- spareness13
- sparteine13
- speediest13
- speedings16
- speedster13
- speerings15
- spermines16
- sphenoids16
- spheriest14
- spheroids15
- sphincter18
- sphingids18
- spiceries15
- spiciness16
- spiderier13
- spiderish15
- spikiness17
- spindlers15
- spindlier15
- spindrift17
- spineless14
- spininess14
- spinneret14
- spinosity15
- spinsters13
- spitfires15
- spleenier14
- splinters14
- splintery16
- sprinters13
- staidness11
- starships14
- steadiers10
- steapsins13
- stearines10
- steepened14
- steepness13
- steersmen13
- stenchier15
- sternites10
- sternness11
- stonished13
- stonishes12
- storeship14
- stressing12
- stridence14
- stridency16
- stripiest12
- stripings15
- stylisers12
- stypsises14
- superhits15
- supersede14
- supersets13
- superthin16
- suspender15
- suspenser14
- sweepiest15
- sweetness13
- swineherd16
- swishiest14
- swithered15
- synapsids16
- synereses12
- syneresis12
- synergids15
- synergies14
- synergist14
- synesises12
- synizeses21
- synizesis21
- syntheses14
- synthesis14
- syphering19
- syrphians17
- tardiness11
- tarnished13
- tarnishes12
- teensiest10
- teentsier10
- telphered16
- tenderers11
- tenderest11
- tenderize20
- tendresse11
- tenseness11
- tensities10
- tephrites14
- tepidness14
- teredines11
- terpenoid14
- terseness10
- testiness10
- theorised12
- theorises11
- therapies14
- therapsid15
- theremins15
- thespians15
- thirteens12
- threeping17
- threnodes13
- thymidine18
- tigereyes13
- tigresses11
- timidness14
- tipsiness13
- tiredness11
- topsiders13
- tranships15
- transship15
- trendiest11
- trephined16
- trephines15
- tressiest9
- tricepses15
- tripodies13
- triteness10
- tundishes14
- twinships18
- typifiers17
- tyrosines12
- undersets12
- undresses12
- unpressed15
- unsphered17
- unspheres16
- weediness14
- weensiest13
- weirdness14
- wetnesses13
- whispered18
- whiteners15
- whiteness15
- winepress16
- wispiness16
- witnessed14
- witnesses13
- wrynesses15
- yestreens12