4 letters
- rims7
- ring7
- rins5
- rips7
- rise4
- risk8
- rubs8
- rues5
- ruff11
- ruga7
- rugs7
- ruin6
- rums8
- rung8
- runs6
- ruse5
- rush7
- rusk9
- rust5
- ruth7
- ruts5
- sari4
- seif7
- serf7
- shag8
- shim9
- shin7
- ship9
- shit6
- shiv10
- shog8
- shri6
- shul8
- shun8
- shut7
- sift7
- sigh8
- sign7
- sing7
- sinh7
- sire4
- sirs4
- sith6
- slug8
- slur6
- smug10
- snug8
- sori4
- sour5
- spur8
- sris4
- stir4
- such10
- suer5
- sugh9
- suit5
- sung8
- sura5
- surd6
- sure5
- surf8
- swig9
- thir6
- this6
- thru7
- thug9
- thus7
- tiff10
- trig6
- trug7
- tuff11
- tugs7
- tuis5
- turf8
- tush7
- ughs9
- urbs8
- urds6
- urge7
- uric8
- urns6
- ursa5
- urus6
- user5
- vigs10
- vugh13
- vugs11
- whig11
- whir9
- wigs9
- wish9
- zigs15