4 letters
- rush7
- rusk9
- rust5
- ruts5
- ryes6
- ryke10
- sake8
- same7
- sark8
- scum11
- seam7
- sear4
- seek8
- seem7
- seer4
- seme7
- semi7
- sera4
- sere4
- serf7
- sers4
- sike8
- sire4
- skee8
- skeg10
- skep11
- skew11
- skim11
- skua9
- slue6
- slum9
- slur6
- smew10
- smug10
- smut8
- soke8
- some7
- sore4
- souk9
- sour5
- spue8
- spur8
- stem7
- stum8
- suck12
- sued6
- suer5
- sues5
- suet5
- sulk10
- sumo8
- sump11
- sums8
- sunk10
- supe8
- sura5
- surd6
- sure5
- surf8
- swum11
- syke10
- term7
- trek8
- true5
- turk9
- tusk9
- ukes9
- umps11
- urbs8
- urds6
- urea5
- urge7
- urns6
- ursa5
- urus6
- used6
- user5
- uses5
- yerk10
- yeuk11
- yuks11
- zeks17
- zerk17