4 letters
- sark8
- saul6
- sawn8
- scan8
- scup11
- shun8
- sink9
- skag10
- skas8
- skat8
- skep11
- skin9
- skip11
- skua9
- slap8
- snag7
- snap8
- snaw8
- snip8
- snub9
- snug8
- soak8
- soap7
- souk9
- soup8
- spae7
- spam10
- span8
- spar7
- spas7
- spat7
- spay9
- spaz16
- spik11
- spin8
- spud9
- spue8
- spun9
- spur8
- stun6
- suba8
- suck12
- sulk10
- sump11
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sups8
- sura5
- swan8
- swap10
- tank9
- tans5
- taps7
- task8
- taus5
- tuna6
- tuns6
- tups8
- tusk9
- ukes9
- ulan7
- ulna7
- umps11
- unai6
- unau7
- upas8
- upon9
- urns6
- ursa5
- utas5
- vans9
- vaus9
- wans8
- waps10
- wasp10
- wauk12
- yaks10
- yank11
- yaps9
- yaup10
- yuan8
- yuks11
- yups10
- zaps16