4 letters
- puns9
- push10
- rash6
- rhus7
- runs6
- rush7
- sack11
- sacs7
- saga6
- sain5
- sand6
- sane5
- sang7
- sank9
- sans5
- sash6
- saul6
- sawn8
- scab10
- scad8
- scag9
- scam10
- scan8
- scar7
- scat7
- scud9
- scum11
- scup11
- scut8
- shad7
- shag8
- shah8
- sham9
- shat6
- shaw9
- shay8
- shea6
- shin7
- shul8
- shun8
- shut7
- sinh7
- skua9
- snag7
- snap8
- snaw8
- snub9
- snug8
- span8
- spun9
- stun6
- suba8
- such10
- suck12
- sugh9
- sung8
- sunk10
- sunn7
- suns6
- sura5
- swan8
- sync10
- tach9
- tans5
- taus5
- than7
- thus7
- tuna6
- tuns6
- tush7
- ughs9
- ulan7
- ulna7
- unai6
- unau7
- unci9
- unco9
- upas8
- urns6
- ursa5
- utas5
- vacs11
- vans9
- vasa8
- vaus9
- wans8
- wash9
- yuan8
- yuca10
- yuch12