4 letters
- sima7
- sink9
- skag10
- skas8
- skat8
- skid9
- skim11
- skin9
- skip11
- skis8
- skit8
- skua9
- slab8
- slub9
- snib8
- snub9
- soak8
- souk9
- spik11
- stab7
- stub8
- suba8
- subs8
- suck12
- suit5
- sulk10
- sunk10
- sura5
- swab10
- tabs7
- tabu8
- task8
- taus5
- tuba8
- tubs8
- tuis5
- tusk9
- ukes9
- unai6
- upas8
- urbs8
- ursa5
- utas5
- vaus9
- visa8
- wabs10
- wauk12
- yaks10
- yuks11