4 letters
- rums8
- runs6
- ruse5
- rush7
- rusk9
- rust5
- ruts5
- sacs7
- scar7
- scop10
- scot7
- scow10
- scry9
- scud9
- scum11
- scup11
- scut8
- secs7
- serf7
- sers4
- sics7
- sirs4
- slur6
- soar4
- sobs7
- sock11
- sods5
- sofa7
- soft7
- sols5
- sons5
- sops7
- sora4
- sorb7
- sord5
- sore4
- sori4
- sorn5
- sort4
- sots4
- souk9
- soul6
- soup8
- sour5
- sous5
- sows7
- soys6
- spur8
- sris4
- subs8
- such10
- suck12
- suds6
- suer5
- sues5
- sumo8
- sums8
- suns6
- sups8
- suqs14
- sura5
- surd6
- sure5
- surf8
- suss5
- toff10
- tofu8
- torc7
- torr4
- tors4
- toss4
- tour5
- tuff11
- turf8
- udos6
- unco9
- urbs8
- urds6
- uric8
- urns6
- ursa5
- urus6
- user5
- uses5
- wuss8
- your7