4 letters
- snug8
- soak8
- soar4
- soda5
- sora4
- sord5
- sorn5
- souk9
- sour5
- span8
- spar7
- spud9
- spun9
- spur8
- star4
- stud6
- stun6
- suba8
- suck12
- sudd7
- suds6
- sued6
- suer5
- sulk10
- sung8
- sunk10
- sunn7
- suns6
- sura5
- surd6
- sure5
- surf8
- swan8
- tads5
- tank9
- tans5
- tarn5
- tars4
- task8
- taus5
- trad5
- tsar4
- tuna6
- tuns6
- turd6
- turk9
- turn6
- tusk9
- udos6
- ukes9
- ulan7
- ulna7
- unai6
- unau7
- unde7
- undo7
- undy9
- upas8
- urbs8
- urds6
- urea5
- urns6
- ursa5
- urus6
- used6
- user5
- utas5
- vans9
- vars8
- vaus9
- wads8
- wand9
- wans8
- ward8
- wark11
- warn8
- wars7
- wauk12
- waur8
- yaks10
- yank11
- yard7
- yarn7
- yaud8
- yuan8
- yuks11