9 letters
- seatrains10
- semestral13
- semimetal16
- semimoist15
- serialise10
- serialism13
- serialist10
- sibilates13
- silicates13
- simulates14
- sinistral11
- slimpsier16
- slimsiest13
- slummiest17
- smaltines14
- smaltites13
- smarmiest15
- smeariest12
- smirkiest16
- snarliest11
- solitaire10
- spermatia15
- spritsail13
- staircase12
- stapelias13
- staumrels14
- sterigmas14
- summaries16
- summarise16
- swimmiest18
- swirliest13
- taeniasis10
- tailraces13
- talismans14
- tallaisim14
- tamarisks16
- teratisms12
- terminals14
- tiramisus13
- trailless11
- trailside11
- tramlines14
- triadisms13
- tribalism16
- triskelia14
- trisomies12
- troilisms13
- tularemia14
- ultraisms14
- utilisers11
- varietals14
- varsities13
- vitalises14
- vitalisms17
- wassailer13
- wistarias12
- wisterias12