4 letters
- sima7
- sine5
- sing7
- sinh7
- sink9
- sins5
- sire4
- sirs4
- skag10
- skas8
- skat8
- skid9
- skim11
- skin9
- skip11
- skis8
- skit8
- skua9
- slab8
- snag7
- snap8
- snaw8
- snib8
- snip8
- snit5
- snob8
- snub9
- soak8
- soar4
- sock11
- sora4
- sorb7
- sori4
- sorn5
- span8
- spar7
- spic10
- spik11
- spin8
- sris4
- stab7
- star4
- stir4
- suba8
- suck12
- sunk10
- sura5
- swab10
- swan8
- sync10
- tabs7
- tack11
- tain5
- taka8
- tank9
- tans5
- tarn5
- tars4
- task8
- tick11
- tics7
- tins5
- tsar4
- unai6
- unci9
- urbs8
- uric8
- urns6
- ursa5
- vacs11
- vain9
- vair8
- vans9
- vara8
- vars8
- vasa8
- vina9
- visa8
- wabs10
- wack14
- wain8
- wair7
- wans8
- wark11
- warn8
- wars7
- wick14
- wink12
- wins8
- yack13
- yaks10
- yank11
- yarn7
- yins7
- yirr6
- zinc17
- zins14