4 letters
- sell6
- semi7
- sham9
- shim9
- shin7
- shul8
- shun8
- sial5
- sibb10
- sibs7
- sign7
- sild6
- silk9
- sill6
- silo5
- silt5
- sima7
- simp10
- sims7
- sine5
- sing7
- sinh7
- sink9
- sins5
- skim11
- skin9
- skua9
- slab8
- slag7
- slam8
- slap8
- slat5
- slaw8
- slay7
- slid6
- slim8
- slip8
- slit5
- slob8
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- smit7
- smug10
- smut8
- snag7
- snap8
- snaw8
- snib8
- snip8
- snit5
- snob8
- snub9
- snug8
- soil5
- sola5
- soli5
- soma7
- soul6
- spam10
- span8
- spin8
- spun9
- stab7
- stub8
- stum8
- stun6
- suba8
- subs8
- suit5
- sulk10
- sulu7
- sumo8
- sump11
- sums8
- sung8
- sunk10
- sunn7
- suns6
- sura5
- swab10
- swam10
- swan8
- swim10
- swum11
- syli7
- tabs7
- tabu8
- tail5
- tain5
- tali5
- tall6
- tams7
- tans5
- taus5
- till6
- tils5
- tins5
- tuba8
- tubs8
- tuis5
- tuna6
- tuns6
- ulan7
- ulna7
- ulus7
- ulva10
- umbo11
- umps11
- unai6
- unau7
- unbe9
- unci9
- unit6
- upas8
- urbs8
- urns6
- ursa5
- utas5
- vail9
- vain9
- vans9
- vaus9
- vial9
- vill10
- vims11
- vina9
- visa8
- wabs10
- wail8
- wain8
- wall9
- wans8
- waul9
- will9
- wins8
- yams9
- yill8
- yins7
- yuan8
- zill15
- zins14