4 letters
- sour5
- sown8
- spew10
- spue8
- spun9
- spur8
- stew7
- stun6
- sued6
- suer5
- sues5
- suet5
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sura5
- surd6
- sure5
- surf8
- swan8
- swum11
- syne7
- tens5
- tern5
- tews7
- true5
- tune6
- tuns6
- turn6
- ukes9
- unbe9
- unde7
- urbs8
- urds6
- urea5
- urge7
- urns6
- ursa5
- urus6
- used6
- user5
- uses5
- waes7
- wane8
- wans8
- ware7
- warn8
- wars7
- waur8
- wean8
- wear7
- webs10
- weds8
- ween8
- weer7
- wees7
- weir7
- wend9
- wens8
- went8
- were7
- wert7
- west7
- wets7
- when10
- wine8
- wins8
- wire7
- wise7
- woes7
- wons8
- wore7
- worn8
- wren8
- wuss8
- wyes9
- wynn11
- wyns10
- yens7
- yews9