4 letters
- sima7
- simp10
- sims7
- sine5
- sing7
- sinh7
- sink9
- sins5
- sire4
- sirs4
- sith6
- skim11
- skin9
- skua9
- slam8
- slim8
- slum9
- slur6
- smit7
- smug10
- smut8
- snag7
- snap8
- snaw8
- snib8
- snip8
- snit5
- snub9
- snug8
- soar4
- soma7
- sora4
- sori4
- sorn5
- sour5
- spam10
- span8
- spar7
- spin8
- spun9
- spur8
- sris4
- star4
- stir4
- stum8
- stun6
- suba8
- such10
- suer5
- sugh9
- suit5
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- sura5
- surd6
- sure5
- surf8
- swam10
- swan8
- swim10
- swum11
- tahr6
- tain5
- tams7
- tans5
- tarn5
- tars4
- taus5
- than7
- thin7
- thir6
- this6
- thru7
- thus7
- tins5
- tram7
- trim7
- tsar4
- tuis5
- tuna6
- tuns6
- turn6
- tush7
- ughs9
- ulan7
- ulna7
- umps11
- unai6
- unau7
- unci9
- unit6
- upas8
- urbs8
- urds6
- urea5
- uric8
- urns6
- ursa5
- urus6
- user5
- utas5
- vain9
- vair8
- vans9
- vara8
- vars8
- vasa8
- vaus9
- vims11
- vina9
- visa8
- wain8
- wair7
- wans8
- warm10
- warn8
- wars7
- wash9
- waur8
- wham12
- whim12
- whin10
- whir9
- wins8
- wish9
- yams9
- yarn7
- yins7
- yuan8
- zins14