10 letters
- skirmishes19
- slimpsiest17
- slipstream17
- smartasses13
- smitheries15
- spaceships21
- sparsities13
- spearmints17
- spermaries16
- spermatial17
- spermatids17
- sphericity20
- spiritisms16
- spiritless14
- spirometry18
- splashiest16
- spritsails14
- spymasters18
- staircases13
- starfishes15
- steamships18
- storeships15
- stramashes15
- strathspey17
- supersharp19
- supersmart17
- superstars14
- suretyship18
- sybaritism18
- sympathies20
- sympathins21
- sympathise20
- sympathize29
- sympatries18
- symposiast18
- syphilises18
- termitaria13
- therapists15
- therapsids16
- thiaminase16
- transpires14
- transshape16
- transships16
- trashiness13
- trespasser13
- triarchies15
- trichiases15
- tritheisms15
- yardmaster16