10 letters
- spiritless14
- sportiness14
- spottiness14
- springiest16
- spruceness18
- sprynesses16
- sputterers14
- sputtering17
- squintiest21
- stenotypes16
- stepsister13
- stereopsis13
- sternposts14
- straitness11
- strictness14
- stringiest13
- stripeless14
- striptease13
- stupidness16
- sturdiness13
- subentries15
- subsistent15
- sultriness13
- superbness18
- superettes14
- superminis18
- superspies17
- superstate14
- supervenes19
- supervised19
- supervises18
- superwives21
- supineness16
- suretyship18
- surveyings20
- susceptive21
- suspenders16
- suspensers15
- suspensive19
- suspensory17
- sustainers12
- synaeresis13
- syncretise16
- syncretist16
- synergists15
- synthesist15
- tanistries11
- tapestries13
- tartnesses11
- tautnesses12
- tenebrists14
- tepidities14
- terminuses15
- tessituras11
- testifiers13
- testudines13
- tidinesses12
- tininesses12
- tinnituses13
- titanesses11
- transitive15
- travesties14
- trignesses13
- trimnesses14
- triunities12
- truenesses12
- trusteeing14
- trustiness12
- turnstiles13
- turpentine16
- tutoresses11
- typewrites18
- uninterest13
- university18
- unripeness16
- unstressed13
- unstresses12
- uppitiness18
- uppityness20
- venosities15
- vertigines17
- vespertine18
- vespiaries17
- vestiaries14
- victresses17
- vignetters17
- vinosities15
- virtueless16
- virtuosity17
- vitreouses15
- vituperate18
- winteriest14
- wirinesses14
- yeastiness13