4 letters
- self8
- shoo6
- shul8
- sial5
- sift7
- sild6
- silk9
- sill6
- silo5
- silt5
- slid6
- slim8
- slip8
- slit5
- slob8
- sloe5
- slog7
- slop8
- slot5
- slow8
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- sofa7
- soft7
- soil5
- sola5
- sold6
- sole5
- soli5
- solo5
- sols5
- sook8
- soon5
- soot4
- sori4
- souk9
- soul6
- soup8
- sour5
- sous5
- suit5
- sulk10
- sulu7
- sumo8
- surf8
- syli7
- tils5
- tofu8
- toil5
- tolu6
- tool5
- tuis5
- udos6
- ulus7
- viol9
- wolf11
- woof10
- wool8
- woos7
- zoos13