4 letters
- sour5
- sous5
- spec10
- spue8
- spur8
- sris4
- stub8
- suba8
- subs8
- such10
- suck12
- suds6
- sued6
- suer5
- sues5
- suet5
- sulk10
- sulu7
- sums8
- suns6
- supe8
- sups8
- suqs14
- sura5
- surd6
- sure5
- surf8
- suss5
- syce9
- tels5
- true5
- tube8
- tubs8
- tule6
- ukes9
- ulus7
- unbe9
- urbs8
- urds6
- urea5
- urge7
- uric8
- urns6
- ursa5
- urus6
- used6
- user5
- uses5
- verb11
- webs10
- wuss8
- yule8
- zebu17