4 letters
- scud9
- scum11
- scup11
- scut8
- seal5
- sear4
- secs7
- sect7
- seel5
- seer4
- self8
- sell6
- sels5
- sera4
- sere4
- serf7
- sers4
- sewn8
- sews7
- shew9
- shul8
- sice7
- sill6
- sire4
- skew11
- slab8
- slaw8
- sled6
- slew8
- slob8
- sloe5
- slow8
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- smew10
- snub9
- sole5
- sorb7
- sore4
- soul6
- sour5
- spec10
- spew10
- spue8
- spur8
- stew7
- stub8
- suba8
- subs8
- such10
- suck12
- sued6
- suer5
- sues5
- suet5
- sulk10
- sulu7
- supe8
- sura5
- surd6
- sure5
- surf8
- swab10
- swob10
- swum11
- syce9
- tell6
- tels5
- tews7
- true5
- tube8
- tubs8
- tule6
- ukes9
- ulus7
- unbe9
- urbs8
- urds6
- urea5
- urge7
- uric8
- urns6
- ursa5
- urus6
- used6
- user5
- uses5
- verb11
- wabs10
- waes7
- wale8
- wall9
- ware7
- wars7
- waul9
- waur8
- weal8
- wear7
- webs10
- weds8
- weel8
- weer7
- wees7
- weir7
- weld9
- well9
- welt8
- wens8
- were7
- wert7
- west7
- wets7
- wile8
- will9
- wire7
- wise7
- woes7
- wore7
- wren8
- wuss8
- wyes9
- wyle10
- yell8
- yews9
- yule8
- zebu17