4 letters
- rusk9
- rust5
- ruth7
- ruts5
- ryes6
- same7
- scum11
- seam7
- sear4
- seem7
- seer4
- seme7
- semi7
- sera4
- sere4
- serf7
- sers4
- sham9
- shea6
- shed7
- shes6
- shew9
- shim9
- shmo9
- shoe6
- shri6
- shul8
- shun8
- shut7
- sire4
- slue6
- slum9
- slur6
- smew10
- smug10
- smut8
- some7
- sore4
- sour5
- spue8
- spur8
- stem7
- stum8
- such10
- sued6
- suer5
- sues5
- suet5
- sugh9
- sulu7
- sumo8
- sump11
- sums8
- supe8
- sura5
- surd6
- sure5
- surf8
- swum11
- term7
- them9
- thru7
- thus7
- true5
- tush7
- ughs9
- ukes9
- ulus7
- umps11
- urbs8
- urds6
- urea5
- urge7
- urns6
- ursa5
- urus6
- used6
- user5
- uses5