4 letters
- snot5
- snub9
- snug8
- soap7
- soar4
- sora4
- sorn5
- sort4
- soup8
- sour5
- spae7
- spam10
- span8
- spar7
- spas7
- spat7
- spay9
- spaz16
- spin8
- spit7
- spot7
- spry9
- spud9
- spue8
- spun9
- spur8
- stab7
- stag6
- star4
- stat4
- staw7
- stay6
- step7
- stir4
- stoa4
- stop7
- stub8
- stud6
- stum8
- stun6
- suba8
- suer5
- suet5
- suit5
- sulu7
- sump11
- sung8
- sunk10
- sunn7
- suns6
- supe8
- sups8
- sura5
- surd6
- sure5
- surf8
- swan8
- swap10
- swat7
- tabs7
- tabu8
- tads5
- tags6
- tahr6
- tain5
- tamp10
- tams7
- tang7
- tank9
- tans5
- taos4
- tapa7
- tape7
- taps7
- tare4
- tarn5
- taro4
- tarp7
- tars4
- tart4
- task8
- tass4
- tats4
- taus5
- taut5
- tavs8
- taws7
- tear4
- teas4
- tens5
- tepa7
- tern5
- than7
- thru7
- thus7
- tins5
- tips7
- tons5
- tops7
- tora4
- torn5
- tors4
- tour5
- trad5
- tram7
- trap7
- tray6
- trip7
- trop7
- true5
- trug7
- tsar4
- tuba8
- tubs8
- tufa8
- tugs7
- tuis5
- tump11
- tuna6
- tune6
- tung8
- tuns6
- tups8
- turd6
- turf8
- turk9
- turn6
- tush7
- tusk9
- tuts5
- tutu6
- twas7
- tzar13
- ulan7
- ulna7
- ulus7
- umps11
- unai6
- unau7
- unit6
- unto6
- upas8
- upon9
- urbs8
- urds6
- urea5
- urns6
- ursa5
- urus6
- user5
- utas5
- vans9
- vars8
- vast8
- vats8
- vatu9
- vaus9
- wans8
- want8
- waps10
- warn8
- warp10
- wars7
- wart7
- wasp10
- wast7
- wats7
- waur8
- wrap10
- yaps9
- yarn7
- yaup10
- yuan8
- yups10
- yurt7
- zaps16