4 letters
- scop10
- scot7
- scow10
- scry9
- scud9
- scum11
- scup11
- scut8
- seal5
- sear4
- sera4
- shad7
- shag8
- shah8
- sham9
- shat6
- shaw9
- shay8
- shea6
- shin7
- shmo9
- shod7
- shoe6
- shog8
- shoo6
- shop9
- shot6
- show9
- shri6
- shul8
- shun8
- shut7
- sial5
- silo5
- sinh7
- skua9
- slab8
- slag7
- slam8
- slap8
- slat5
- slaw8
- slay7
- slob8
- sloe5
- slog7
- slop8
- slot5
- slow8
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- snag7
- snap8
- snaw8
- snob8
- snog7
- snot5
- snow8
- snub9
- snug8
- snye7
- soak8
- soap7
- soar4
- sock11
- soda5
- sofa7
- soil5
- soja13
- sola5
- sold6
- sole5
- soli5
- solo5
- sols5
- soma7
- sone5
- song7
- sons5
- sook8
- soon5
- soot4
- soph9
- sora4
- sorb7
- sord5
- sore4
- sori4
- sorn5
- sort4
- soth6
- souk9
- soul6
- soup8
- sour5
- sous5
- sown8
- soya6
- soys6
- span8
- spar7
- spay9
- spry9
- spun9
- spur8
- star4
- stay6
- stoa4
- stun6
- suba8
- such10
- suck12
- suer5
- sugh9
- sulk10
- sulu7
- sumo8
- sung8
- sunk10
- sunn7
- suns6
- sura5
- surd6
- sure5
- surf8
- swan8
- sway9
- sybo9
- syce9
- syli7
- sync10
- syne7
- syph11
- tach9
- taco7
- tahr6
- tala5
- talc8
- tans5
- taos4
- tarn5
- taro4
- tars4
- taus5
- than7
- thou7
- thro6
- thru7
- thus7
- tola5
- tolu6
- tons5
- tony7
- tool5
- toon5
- tora4
- torc7
- torn5
- toro4
- tors4
- tory6
- tosh6
- tour5
- toyo6
- toys6
- tray6
- troy6
- tsar4
- tuna6
- tuns6
- turn6
- tush7
- tyro6
- udos6
- ughs9
- ugly10
- ulan7
- ulna7
- ulus7
- ulva10
- unai6
- unau7
- unci9
- unco9
- undo7
- undy9
- unto6
- upas8
- upon9
- urbs8
- urds6
- urea5
- uric8
- urns6
- ursa5
- urus6