4 letters
- sone5
- song7
- sons5
- sook8
- soon5
- sora4
- sorn5
- souk9
- soul6
- soup8
- sour5
- sous5
- sown8
- soya6
- span8
- spun9
- stoa4
- stun6
- suba8
- such10
- suck12
- sulk10
- sulu7
- sumo8
- sung8
- sunk10
- sunn7
- suns6
- sura5
- swan8
- sync10
- tack11
- taco7
- talc8
- talk9
- tank9
- tans5
- taos4
- task8
- taus5
- tola5
- tolu6
- tons5
- tuck12
- tuna6
- tuns6
- tusk9
- udos6
- ukes9
- ulan7
- ulna7
- ulus7
- ulva10
- unai6
- unau7
- unci9
- unco9
- undo7
- unto6
- upas8
- upon9
- urns6
- ursa5
- utas5
- vacs11
- vans9
- vaus9
- wack14
- walk12
- wans8
- wauk12
- waul9
- woks11
- wonk12
- wons8
- yack13
- yaks10
- yank11
- yock13
- yoks10
- yolk11
- yuan8
- yuca10
- yuck14
- yuks11
- zonk18