9 letters
- rotations10
- ruminants15
- ruminates14
- ruminator14
- salmonoid15
- saturnism14
- semilunar15
- semitonal14
- serotinal11
- simulants15
- simulator14
- solariums14
- solations11
- solutions12
- solvation15
- spoliator13
- stillroom14
- stimulant15
- strontium14
- styliform18
- sublation15
- subnormal18
- suctional15
- suctorial14
- suctorian14
- sulfating17
- sulfonate15
- sulfonium19
- summation17
- supinator14
- tandooris11
- terminals14
- tonsillar12
- tonsorial11
- tornillos12
- torsional11
- trainfuls15
- tramlines14
- transform16
- tribunals15
- trifocals16
- trifolium17
- trinomial14
- troopials13
- troupials14
- turbinals15
- turbofans17
- tutorials11
- ufologist16
- ultrafine15
- ultraisms14
- ultrasoft14
- unciforms20
- unfairest14
- uniformly20
- uprootals14
- urologist13
- violators14
- volutions16