4 letters
- runs6
- sadi5
- said5
- sail5
- sain5
- sand6
- saul6
- scud9
- send6
- shin7
- shul8
- shun8
- sial5
- side5
- sign7
- sild6
- silk9
- sill6
- silo5
- silt5
- sine5
- sing7
- sinh7
- sink9
- sins5
- skid9
- skin9
- sled6
- slid6
- slim8
- slip8
- slit5
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- sned6
- snib8
- snip8
- snit5
- snub9
- snug8
- soil5
- sold6
- soli5
- soul6
- spin8
- spud9
- spun9
- stud6
- stun6
- sudd7
- suds6
- sued6
- suit5
- sulk10
- sulu7
- sung8
- sunk10
- sunn7
- suns6
- surd6
- syli7
- tils5
- tins5
- tuis5
- tuns6
- udos6
- ulan7
- ulna7
- ulus7
- unai6
- unci9
- unde7
- undo7
- undy9
- unit6
- urds6
- urns6
- used6
- wild9
- wind9
- wins8
- yids7
- yins7
- zins14