4 letters
- scum11
- seam7
- seem7
- seen5
- seme7
- semi7
- send6
- sene5
- sent5
- sewn8
- shun8
- sibb10
- sine5
- slub9
- slue6
- slum9
- smew10
- smug10
- smut8
- sned6
- snib8
- snob8
- snub9
- snug8
- snye7
- some7
- sone5
- spue8
- spun9
- stem7
- stub8
- stum8
- stun6
- suba8
- subs8
- sued6
- suer5
- sues5
- suet5
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sure5
- swum11
- syne7
- tens5
- tube8
- tubs8
- tune6
- tuns6
- ukes9
- umbo11
- umps11
- unbe9
- unde7
- urbs8
- urns6
- used6
- user5
- uses5
- webs10
- wens8
- yens7
- zebu17