4 letters
- rues5
- rule6
- rums8
- ruse5
- rusk9
- sake8
- sale5
- sall6
- same7
- saul6
- scum11
- seal5
- seam7
- seek8
- seel5
- seem7
- self8
- sell6
- sels5
- seme7
- semi7
- shul8
- sike8
- silk9
- sill6
- skee8
- skeg10
- skep11
- skew11
- skim11
- skua9
- slam8
- sled6
- slew8
- slim8
- sloe5
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- smew10
- smug10
- smut8
- soke8
- sole5
- some7
- souk9
- soul6
- spue8
- stem7
- stum8
- suck12
- sued6
- suer5
- sues5
- suet5
- sulk10
- sulu7
- sumo8
- sump11
- sums8
- sunk10
- supe8
- sure5
- swum11
- syke10
- tell6
- tels5
- tule6
- tusk9
- ukes9
- ulus7
- umps11
- used6
- user5
- uses5
- well9
- yelk11
- yell8
- yeuk11
- ylem10
- yuks11
- yule8
- zeks17