4 letters
- rump11
- rums8
- rune6
- rung8
- runs6
- runt6
- ruse5
- rush7
- rusk9
- rust5
- ruts5
- ryes6
- sain5
- same7
- sane5
- sans5
- sari4
- scum11
- seam7
- sear4
- seas4
- secs7
- seem7
- seen5
- seer4
- sees4
- segs6
- seif7
- seis4
- sels5
- seme7
- semi7
- send6
- sene5
- sent5
- sera4
- sere4
- serf7
- sers4
- sets4
- sewn8
- sews7
- shes6
- shim9
- shin7
- shri6
- shun8
- sibs7
- sice7
- sics7
- side5
- sign7
- sike8
- sima7
- simp10
- sims7
- sine5
- sing7
- sinh7
- sink9
- sins5
- sipe7
- sips7
- sire4
- sirs4
- site4
- sits4
- size13
- skim11
- skin9
- skis8
- slim8
- slue6
- slum9
- slur6
- smew10
- smit7
- smug10
- smut8
- sned6
- snib8
- snip8
- snit5
- snub9
- snug8
- snye7
- some7
- sone5
- sons5
- sore4
- sori4
- sorn5
- sour5
- sous5
- spin8
- spue8
- spun9
- spur8
- sris4
- stem7
- stir4
- stum8
- stun6
- subs8
- suds6
- sued6
- suer5
- sues5
- suet5
- suit5
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sups8
- suqs14
- sura5
- surd6
- sure5
- surf8
- suss5
- swim10
- swum11
- syne7
- tens5
- term7
- tern5
- tier4
- ties4
- time7
- tine5
- tins5
- tire4
- trim7
- true5
- tuis5
- tune6
- tuns6
- turn6
- ukes9
- umps11
- unai6
- unbe9
- unci9
- unde7
- unit6
- urbs8
- urds6
- urea5
- urge7
- uric8
- urns6
- ursa5
- urus6
- used6
- user5
- uses5
- vein9
- vier8
- vies8
- vims11
- vine9
- vise8
- weir7
- wens8
- wine8
- wins8
- wire7
- wise7
- wiss7
- wren8
- wuss8
- yens7
- yins7
- zein14
- zins14