4 letters
- spun9
- spur8
- star4
- stun6
- suba8
- such10
- suer5
- sugh9
- sump11
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sups8
- sura5
- surd6
- sure5
- surf8
- swan8
- swap10
- syph11
- tahr6
- tans5
- taps7
- tarn5
- tarp7
- tars4
- taus5
- than7
- thru7
- thus7
- trap7
- tsar4
- tuna6
- tuns6
- tups8
- turn6
- tush7
- ughs9
- ulan7
- ulna7
- umps11
- unai6
- unau7
- upas8
- upon9
- urbs8
- urds6
- urea5
- urns6
- ursa5
- urus6
- user5
- utas5
- vans9
- vars8
- vaus9
- wans8
- waps10
- warn8
- warp10
- wars7
- wash9
- wasp10
- waur8
- whap12
- wrap10
- yaps9
- yarn7
- yaup10
- yuan8
- yups10
- zaps16