4 letters
- sera4
- shad7
- sham9
- shun8
- sima7
- simp10
- skua9
- slam8
- slap8
- slum9
- slur6
- smug10
- smut8
- snag7
- snap8
- snaw8
- sned6
- snip8
- snub9
- snug8
- soap7
- soar4
- soda5
- soja13
- soma7
- sora4
- sord5
- sorn5
- soup8
- sour5
- spae7
- spam10
- span8
- spar7
- spas7
- spat7
- spay9
- spaz16
- sped8
- spin8
- spry9
- spud9
- spue8
- spun9
- spur8
- star4
- stud6
- stum8
- stun6
- suba8
- sudd7
- suds6
- sued6
- suer5
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sups8
- sura5
- surd6
- sure5
- surf8
- swam10
- swan8
- swap10
- swum11
- tads5
- tamp10
- tams7
- tans5
- tapa7
- taps7
- tarn5
- tarp7
- tars4
- taus5
- trad5
- tram7
- trap7
- tsar4
- tump11
- tuna6
- tuns6
- tups8
- turd6
- turn6
- udos6
- ulan7
- ulna7
- umps11
- unai6
- unau7
- unde7
- undo7
- undy9
- upas8
- updo9
- upon9
- urbs8
- urds6
- urea5
- urns6
- ursa5
- urus6
- used6
- user5
- utas5
- vamp14
- vans9
- vara8
- vars8
- vasa8
- vaus9
- wads8
- wand9
- wans8
- waps10
- ward8
- warm10
- warn8
- warp10
- wars7
- wasp10
- waur8
- wrap10
- yams9
- yaps9
- yard7
- yarn7
- yaud8
- yaup10
- yuan8
- yups10
- zaps16