4 letters
- shun8
- shut7
- skat8
- skua9
- slat5
- slut6
- smut8
- snag7
- snap8
- snaw8
- snit5
- snot5
- snub9
- snug8
- span8
- spat7
- spun9
- stab7
- stag6
- star4
- stat4
- staw7
- stay6
- stoa4
- stub8
- stud6
- stum8
- stun6
- suba8
- such10
- suck12
- suet5
- suit5
- sung8
- sunk10
- sunn7
- suns6
- sura5
- swan8
- swat7
- sync10
- tabs7
- tabu8
- tace7
- tach9
- tack11
- taco7
- tact7
- tads5
- tags6
- tain5
- talc8
- tams7
- tang7
- tank9
- tans5
- taos4
- taps7
- tarn5
- tars4
- task8
- tass4
- tats4
- taus5
- taut5
- tavs8
- taws7
- teas4
- tens5
- than7
- thus7
- tics7
- tins5
- tons5
- tsar4
- tuba8
- tubs8
- tuck12
- tufa8
- tugs7
- tuis5
- tuna6
- tune6
- tung8
- tuns6
- tups8
- turn6
- tush7
- tusk9
- tuts5
- twas7
- ulan7
- ulna7
- unai6
- unau7
- unci9
- unco9
- unit6
- unto6
- upas8
- urns6
- ursa5
- utas5
- vacs11
- vans9
- vast8
- vats8
- vatu9
- vaus9
- wans8
- want8
- wast7
- wats7
- yuan8
- yuca10