4 letters
- sial5
- sibb10
- sibs7
- sick11
- sics7
- sike8
- sild6
- silk9
- sill6
- silo5
- silt5
- sims7
- sink9
- sins5
- sips7
- sirs4
- sits4
- skas8
- skid9
- skim11
- skin9
- skip11
- skis8
- skit8
- skua9
- slab8
- slid6
- slim8
- slip8
- slit5
- slob8
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- snib8
- snub9
- sobs7
- soil5
- soli5
- sols5
- souk9
- soul6
- sous5
- spik11
- sris4
- stub8
- suba8
- subs8
- suck12
- suds6
- sues5
- suit5
- sulk10
- sulu7
- sums8
- sunk10
- suns6
- sups8
- suqs14
- suss5
- syli7
- till6
- tils5
- tsks8
- tubs8
- tuis5
- tusk9
- ukes9
- ulus7
- urbs8
- uses5
- vill10
- will9
- wiss7
- wuss8
- yill8
- yuks11
- zill15