4 letters
- self8
- sell6
- sels5
- send6
- sene5
- sent5
- sewn8
- shul8
- shun8
- sice7
- sick11
- sike8
- silk9
- sine5
- sink9
- skee8
- skeg10
- skep11
- skew11
- skin9
- skua9
- slab8
- sled6
- slew8
- slob8
- sloe5
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- sned6
- snib8
- snob8
- snub9
- snug8
- snye7
- sock11
- soke8
- sole5
- sone5
- souk9
- soul6
- spec10
- spue8
- spun9
- stub8
- stun6
- suba8
- subs8
- such10
- suck12
- sued6
- suer5
- sues5
- suet5
- sulk10
- sulu7
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sure5
- syce9
- syke10
- sync10
- syne7
- tels5
- tens5
- tube8
- tubs8
- tuck12
- tule6
- tune6
- tuns6
- tusk9
- ukes9
- ulan7
- ulna7
- ulus7
- unau7
- unbe9
- unci9
- unco9
- unde7
- urbs8
- urns6
- urus6
- used6
- user5
- uses5
- webs10
- wens8
- yelk11
- yens7
- yeuk11
- yuck14
- yuks11
- yule8
- zebu17
- zeks17