4 letters
- scan8
- scar7
- scum11
- seal5
- seam7
- sear4
- sera4
- sham9
- shul8
- shun8
- sial5
- sima7
- skua9
- slab8
- slag7
- slam8
- slap8
- slat5
- slaw8
- slay7
- slim8
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- smug10
- smut8
- snag7
- snap8
- snaw8
- snub9
- snug8
- soar4
- sola5
- soma7
- sora4
- sorn5
- soul6
- sour5
- spam10
- span8
- spar7
- spun9
- spur8
- star4
- stum8
- stun6
- suba8
- suer5
- sulk10
- sulu7
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- sura5
- surd6
- sure5
- surf8
- swam10
- swan8
- swum11
- tams7
- tans5
- tarn5
- tars4
- taus5
- tram7
- tsar4
- tuna6
- tuns6
- turn6
- ulan7
- ulna7
- ulus7
- ulva10
- umps11
- unai6
- unau7
- upas8
- urbs8
- urds6
- urea5
- urns6
- ursa5
- urus6
- user5
- utas5
- vans9
- vars8
- vaus9
- wans8
- warm10
- warn8
- wars7
- waul9
- waur8
- yams9
- yarn7
- yuan8