9 letters
- setenants11
- shadiness13
- shaftings17
- shakiness16
- sheeniest12
- sheetings14
- shiftiest14
- shiftless15
- shiitakes15
- shininess13
- shinleafs16
- shynesses14
- sightseen14
- sightsees13
- sinfonias14
- sirenians11
- skinniest15
- sneakiest14
- snideness12
- sniffiest16
- spininess14
- staginess12
- staidness11
- stainless11
- staleness11
- stannites11
- steapsins13
- stearines10
- sternness11
- stiffness16
- stonefish15
- stoniness11
- stonishes12
- sunfishes16
- sunshines14
- swiftness16
- swishiest14
- synesises12
- syntheses14
- synthesis14
- taeniases10
- taeniasis10
- tanneries11
- tarnishes12
- tastiness10
- tawniness14
- tenancies14
- tenseness11
- tensities10
- testifies12
- testiness10
- tetanises10
- thebaines15
- thespians15
- thiamines15
- thiazines21
- thingness15
- thionines13
- tiffanies16
- tinniness12
- tipsiness13
- uneasiest11
- unfastens15
- unfitness15
- venetians15
- wannesses14
- whatsises14
- whinniest16
- whiteness15
- wiseasses12
- witnesses13
- xantheins20
- xanthenes20
- xanthines20