4 letters
- spam10
- span8
- spar7
- spas7
- spat7
- spay9
- spaz16
- sped8
- spic10
- spik11
- spin8
- spit7
- spiv11
- spry9
- spud9
- spur8
- sris4
- stab7
- star4
- stir4
- suba8
- subs8
- suds6
- sups8
- sura5
- surd6
- swab10
- swap10
- syph11
- tabs7
- tads5
- tahr6
- taps7
- tarp7
- tars4
- tass4
- thir6
- this6
- tips7
- trad5
- trap7
- trip7
- tsar4
- upas8
- urbs8
- urds6
- ursa5
- vair8
- vars8
- visa8
- wabs10
- wadi8
- wads8
- wair7
- waps10
- ward8
- warp10
- wars7
- wash9
- wasp10
- whap12
- whid10
- whip12
- whir9
- wish9
- wisp10
- wiss7
- wrap10
- yaps9
- yard7
- yids7
- yips9
- yird7
- zaps16
- zips16