4 letters
- scum11
- seam7
- sear4
- semi7
- sera4
- sham9
- shim9
- shri6
- sial5
- sibb10
- sibs7
- sima7
- simp10
- sims7
- sire4
- sirs4
- skim11
- skua9
- slab8
- slam8
- slim8
- slub9
- slum9
- slur6
- smit7
- smug10
- smut8
- snib8
- snub9
- soar4
- soma7
- sora4
- sorb7
- sori4
- sour5
- spam10
- spar7
- spur8
- sris4
- stab7
- star4
- stir4
- stub8
- stum8
- suba8
- subs8
- suer5
- suit5
- sumo8
- sump11
- sums8
- sura5
- surd6
- sure5
- surf8
- swab10
- swam10
- swim10
- swum11
- tabs7
- tabu8
- tams7
- tars4
- taus5
- tram7
- trim7
- tsar4
- tuba8
- tubs8
- tuis5
- umbo11
- umps11
- unai6
- upas8
- urbs8
- urds6
- urea5
- uric8
- urns6
- ursa5
- urus6
- user5
- utas5
- vair8
- vars8
- vaus9
- vims11
- visa8
- wabs10
- wair7
- warm10
- wars7
- waur8
- yams9