4 letters
- roms7
- rums8
- runs6
- sand6
- sans5
- scud9
- scum11
- send6
- shmo9
- shod7
- shun8
- sims7
- sins5
- slum9
- smog9
- smug10
- smut8
- sned6
- snob8
- snog7
- snot5
- snow8
- snub9
- snug8
- sobs7
- soda5
- sods5
- sold6
- sols5
- soma7
- some7
- sone5
- song7
- sons5
- soon5
- sops7
- sord5
- sorn5
- sots4
- souk9
- soul6
- soup8
- sour5
- sous5
- sown8
- sows7
- soys6
- spud9
- spun9
- stud6
- stum8
- stun6
- subs8
- sudd7
- suds6
- sued6
- sues5
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- sups8
- suqs14
- surd6
- suss5
- swum11
- tods5
- toms7
- tons5
- toss4
- tuns6
- udos6
- umbo11
- umps11
- unco9
- unde7
- undo7
- undy9
- unto6
- updo9
- upon9
- urds6
- urns6
- used6
- uses5
- wons8
- wuss8
- yods7
- yond8