4 letters
- self8
- seme7
- semi7
- sera4
- sere4
- serf7
- sers4
- sire4
- slue6
- slum9
- slur6
- smew10
- smug10
- smut8
- some7
- sore4
- sour5
- spue8
- spur8
- stem7
- stum8
- sued6
- suer5
- sues5
- suet5
- sumo8
- sump11
- sums8
- supe8
- sura5
- surd6
- sure5
- surf8
- swum11
- term7
- tref7
- true5
- turf8
- ukes9
- umps11
- urbs8
- urds6
- urea5
- urge7
- urns6
- ursa5
- urus6
- used6
- user5
- uses5