4 letters
- sorb7
- sori4
- sorn5
- souk9
- soul6
- soup8
- sour5
- sous5
- sown8
- spin8
- spun9
- stob7
- stub8
- stum8
- stun6
- suba8
- subs8
- suit5
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- swim10
- swob10
- swum11
- sybo9
- tins5
- tomb10
- toms7
- tons5
- toom7
- toon5
- tubs8
- tuis5
- tuns6
- udos6
- umbo11
- umps11
- unai6
- unbe9
- unci9
- unco9
- undo7
- unit6
- unto6
- upon9
- urbs8
- urns6
- vims11
- vino9
- wino8
- wins8
- womb13
- wons8
- woos7
- yins7
- yobs9
- yoni7
- zins14
- zoom16
- zoon14
- zoos13