4 letters
- scan8
- seas4
- seis4
- shin7
- ship9
- sial5
- sibs7
- sics7
- sign7
- sima7
- simp10
- sims7
- sine5
- sing7
- sinh7
- sink9
- sins5
- sipe7
- sips7
- sirs4
- sits4
- skas8
- skin9
- skip11
- skis8
- slap8
- slip8
- snag7
- snap8
- snaw8
- snib8
- snip8
- snit5
- soap7
- sons5
- sops7
- spae7
- spam10
- span8
- spar7
- spas7
- spat7
- spay9
- spaz16
- spic10
- spik11
- spin8
- spit7
- spiv11
- spun9
- sris4
- suns6
- sups8
- swan8
- swap10
- tain5
- tans5
- taps7
- tass4
- tins5
- tips7
- unai6
- upas8
- vain9
- vans9
- vina9
- visa8
- wain8
- wans8
- waps10
- wasp10
- wins8
- wisp10
- wiss7
- yaps9
- yins7
- yips9
- zaps16
- zins14
- zips16