4 letters
- scat7
- scry9
- scud9
- scum11
- scup11
- scut8
- sear4
- seas4
- secs7
- seis4
- sera4
- sers4
- shad7
- shag8
- shah8
- sham9
- shat6
- shaw9
- shay8
- shea6
- shes6
- shim9
- shin7
- ship9
- shit6
- shiv10
- shri6
- shul8
- shun8
- shut7
- sial5
- sibs7
- sice7
- sick11
- sics7
- sigh8
- sima7
- sims7
- sinh7
- sins5
- sips7
- sire4
- sirs4
- sith6
- sits4
- skas8
- skis8
- skua9
- slur6
- soar4
- sora4
- sori4
- sour5
- sous5
- spar7
- spas7
- spic10
- spur8
- sris4
- star4
- stir4
- suba8
- subs8
- such10
- suck12
- suds6
- suer5
- sues5
- sugh9
- suit5
- sums8
- suns6
- sups8
- suqs14
- sura5
- surd6
- sure5
- surf8
- suss5
- tach9
- tahr6
- tars4
- tass4
- taus5
- thir6
- this6
- thru7
- thus7
- tics7
- tsar4
- tuis5
- tush7
- ughs9
- unai6
- unci9
- upas8
- urbs8
- urds6
- urea5
- uric8
- urns6
- ursa5
- urus6
- user5
- uses5
- utas5
- vacs11
- vair8
- vars8
- vaus9
- visa8
- wair7
- wars7
- wash9
- waur8
- whir9
- wich12
- wish9
- wiss7
- wuss8
- yirr6
- yuca10
- yuch12