4 letters
- shun8
- sice7
- sine5
- sire4
- skee8
- slub9
- slue6
- slur6
- sned6
- snib8
- snob8
- snub9
- snug8
- snye7
- sone5
- sorb7
- sore4
- sorn5
- sour5
- spec10
- spue8
- spun9
- spur8
- stub8
- stun6
- suba8
- subs8
- such10
- suck12
- sued6
- suer5
- sues5
- suet5
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sura5
- surd6
- sure5
- surf8
- syce9
- sync10
- syne7
- teen5
- tees4
- tens5
- tern5
- tree4
- true5
- tube8
- tubs8
- tune6
- tuns6
- turn6
- ukes9
- unbe9
- unci9
- unco9
- unde7
- urbs8
- urds6
- urea5
- urge7
- uric8
- urns6
- ursa5
- urus6
- used6
- user5
- uses5
- veer8
- vees8
- verb11
- webs10
- ween8
- weer7
- wees7
- wens8
- were7
- wren8
- yens7
- zebu17
- zees13