9 letters
- spreading16
- sprinters13
- staginess12
- staidness11
- stainless11
- standpipe17
- starkness14
- starnoses10
- starships14
- steadiers10
- steadings13
- steapsins13
- stearines10
- stinkards15
- strainers10
- straitens10
- stranders11
- strapless13
- stressing12
- supinated15
- supinates14
- surpassed14
- sustained12
- sustainer11
- swartness13
- synapsids16
- tardiness11
- tarnished13
- tarnishes12
- tastiness10
- tepidness14
- terrapins13
- therapsid15
- thespians15
- tipsiness13
- tiredness11
- topsiders13
- transepts13
- tranships15
- transited11
- transpire13
- transpose13
- transship15
- transudes12
- trapesing15
- traplines14
- trapnests13
- trepidant14
- triplanes14
- triptanes13
- underpass15
- vapidness18