4 letters
- rune6
- runs6
- ruse5
- sabe7
- sabs7
- same7
- sane5
- sans5
- scum11
- seam7
- seas4
- secs7
- seem7
- seen5
- sees4
- segs6
- seis4
- sels5
- seme7
- semi7
- send6
- sene5
- sent5
- sers4
- sets4
- sewn8
- sews7
- shes6
- shun8
- sibs7
- sims7
- sine5
- sins5
- slub9
- slue6
- slum9
- smew10
- smug10
- smut8
- sned6
- snib8
- snob8
- snub9
- snug8
- snye7
- sobs7
- some7
- sone5
- sons5
- sous5
- spue8
- spun9
- stem7
- stub8
- stum8
- stun6
- suba8
- subs8
- suds6
- sued6
- suer5
- sues5
- suet5
- sulu7
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sups8
- suqs14
- sure5
- suss5
- swum11
- syne7
- tens5
- tube8
- tubs8
- tune6
- tuns6
- ukes9
- ulus7
- umbo11
- umps11
- unau7
- unbe9
- unde7
- urbs8
- urns6
- urus6
- used6
- user5
- uses5
- webs10
- wens8
- wuss8
- yens7
- zebu17