4 letters
- smug10
- smut8
- snob8
- snub9
- sobs7
- sock11
- sods5
- sols5
- soma7
- some7
- sons5
- sops7
- sorb7
- sots4
- souk9
- soul6
- soup8
- sour5
- sous5
- sows7
- soys6
- stob7
- stub8
- stum8
- suba8
- subs8
- such10
- suck12
- suds6
- sues5
- sulu7
- sumo8
- sump11
- sums8
- suns6
- sups8
- suqs14
- suss5
- swob10
- swum11
- sybo9
- tomb10
- toms7
- toss4
- tubs8
- udos6
- ulus7
- umbo11
- umps11
- unco9
- urbs8
- urus6
- uses5
- womb13
- wuss8
- yobs9