4 letters
- rugs7
- ruin6
- rule6
- rump11
- rums8
- rune6
- rung8
- runs6
- runt6
- ruse5
- rush7
- rusk9
- rust5
- ruts5
- ryes6
- sabe7
- sabs7
- sacs7
- sage6
- sags6
- same7
- sane5
- sang7
- sans5
- scab10
- scag9
- scam10
- scan8
- scar7
- scry9
- scud9
- scum11
- scup11
- scut8
- seam7
- sear4
- seas4
- secs7
- sect7
- seed5
- seek8
- seel5
- seem7
- seen5
- seep7
- seer4
- sees4
- sego6
- segs6
- seis4
- sels5
- seme7
- semi7
- send6
- sene5
- sent5
- sera4
- sere4
- serf7
- sers4
- sets4
- sewn8
- sews7
- shes6
- shun8
- sibs7
- sice7
- sics7
- sign7
- sims7
- sine5
- sing7
- sins5
- sire4
- sirs4
- skee8
- skeg10
- slub9
- slue6
- slug8
- slum9
- slur6
- smew10
- smog9
- smug10
- smut8
- snag7
- sned6
- snib8
- snob8
- snog7
- snub9
- snug8
- snye7
- sobs7
- some7
- sone5
- song7
- sons5
- sorb7
- sore4
- sorn5
- sour5
- sous5
- spec10
- spue8
- spun9
- spur8
- sris4
- stem7
- stub8
- stum8
- stun6
- suba8
- subs8
- such10
- suck12
- suds6
- sued6
- suer5
- sues5
- suet5
- sugh9
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sups8
- suqs14
- sura5
- surd6
- sure5
- surf8
- suss5
- swum11
- syce9
- sync10
- syne7
- teem7
- teen5
- tees4
- tegs6
- tens5
- term7
- tern5
- tree4
- true5
- trug7
- tube8
- tubs8
- tugs7
- tune6
- tung8
- tuns6
- turn6
- ughs9
- ukes9
- umbo11
- umps11
- unbe9
- unci9
- unco9
- unde7
- urbs8
- urds6
- urea5
- urge7
- uric8
- urns6
- ursa5
- urus6
- used6
- user5
- uses5
- veer8
- vees8
- verb11
- vugs11
- webs10
- ween8
- weer7
- wees7
- wens8
- were7
- wren8
- wuss8
- yens7
- zebu17
- zees13