4 letters
- runs6
- ruse5
- rush7
- rusk9
- rust5
- ruts5
- scab10
- scar7
- scop10
- scot7
- scow10
- scry9
- scud9
- scum11
- scup11
- scut8
- slob8
- slub9
- slur6
- snob8
- snub9
- soar4
- sobs7
- sock11
- sora4
- sorb7
- sord5
- sore4
- sori4
- sorn5
- sort4
- souk9
- soul6
- soup8
- sour5
- sous5
- spur8
- stob7
- stub8
- suba8
- subs8
- such10
- suck12
- suer5
- sumo8
- sura5
- surd6
- sure5
- surf8
- swob10
- sybo9
- torc7
- tors4
- tour5
- tubs8
- udos6
- umbo11
- unco9
- urbs8
- urds6
- uric8
- urns6
- ursa5
- urus6
- user5
- yobs9
- your7