4 letters
- skua9
- slap8
- slur6
- snap8
- soap7
- soar4
- sora4
- soup8
- sour5
- spae7
- spam10
- span8
- spar7
- spas7
- spat7
- spay9
- spaz16
- spry9
- spud9
- spue8
- spun9
- spur8
- star4
- suba8
- suer5
- sump11
- supe8
- sups8
- sura5
- surd6
- sure5
- surf8
- swap10
- tapa7
- taps7
- tarp7
- tars4
- taus5
- trap7
- tsar4
- tups8
- umps11
- upas8
- urbs8
- urds6
- urea5
- urns6
- ursa5
- urus6
- user5
- utas5
- vara8
- vars8
- vasa8
- vaus9
- waps10
- warp10
- wars7
- wasp10
- waur8
- wrap10
- yaps9
- yaup10
- yups10
- zaps16