4 letters
- rues5
- ruff11
- rugs7
- ruin6
- rums8
- rune6
- rung8
- runs6
- runt6
- ruse5
- rush7
- rusk9
- rust5
- ruth7
- ruts5
- sain5
- sari4
- seif7
- serf7
- shim9
- shin7
- ship9
- shit6
- shiv10
- shri6
- shul8
- shun8
- shut7
- sift7
- sigh8
- sign7
- sine5
- sing7
- sinh7
- sink9
- sins5
- sire4
- sirs4
- sith6
- skin9
- slur6
- snib8
- snip8
- snit5
- snub9
- snug8
- sori4
- sorn5
- sour5
- spin8
- spun9
- spur8
- sris4
- stir4
- stun6
- such10
- suer5
- sugh9
- suit5
- sung8
- sunk10
- sunn7
- suns6
- sura5
- surd6
- sure5
- surf8
- thin7
- thir6
- this6
- thru7
- thus7
- tins5
- tuis5
- tuns6
- turf8
- turn6
- tush7
- ughs9
- unai6
- unci9
- unit6
- urbs8
- urds6
- uric8
- urns6
- ursa5
- urus6
- user5
- whin10
- whir9
- wins8
- wish9
- yins7
- zins14