4 letters
- slop8
- slot5
- slow8
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- snob8
- snog7
- snot5
- snow8
- snub9
- snug8
- sock11
- soil5
- sola5
- sold6
- sole5
- soli5
- solo5
- sols5
- sone5
- song7
- sons5
- soon5
- sorn5
- souk9
- soul6
- soup8
- sour5
- sous5
- sown8
- spun9
- stun6
- such10
- suck12
- sulk10
- sulu7
- sumo8
- sung8
- sunk10
- sunn7
- suns6
- sync10
- tolu6
- tons5
- tuns6
- udos6
- ulan7
- ulna7
- ulus7
- unci9
- unco9
- undo7
- unto6
- upon9
- urns6
- wons8