4 letters
- runs6
- rusk9
- sack11
- sail5
- sain5
- sake8
- saki8
- sale5
- sall6
- salp8
- sals5
- salt5
- sand6
- sane5
- sang7
- sank9
- sans5
- sark8
- saul6
- sawn8
- scan8
- seal5
- shul8
- shun8
- sial5
- silk9
- sink9
- skag10
- skas8
- skat8
- skin9
- skua9
- slab8
- slag7
- slam8
- slap8
- slat5
- slaw8
- slay7
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- snag7
- snap8
- snaw8
- snub9
- snug8
- soak8
- sola5
- souk9
- soul6
- span8
- spun9
- stun6
- suba8
- suck12
- sulk10
- sulu7
- sung8
- sunk10
- sunn7
- suns6
- sura5
- swan8
- talk9
- tank9
- tans5
- task8
- taus5
- tuna6
- tuns6
- tusk9
- ukes9
- ulan7
- ulna7
- ulus7
- ulva10
- unai6
- unau7
- upas8
- urns6
- ursa5
- utas5
- vans9
- vaus9
- walk12
- wans8
- wauk12
- waul9
- yaks10
- yank11
- yuan8
- yuks11