4 letters
- runs6
- runt6
- rust5
- ruts5
- sain5
- sari4
- sati4
- scan8
- scar7
- scat7
- scop10
- scot7
- scup11
- scut8
- sift7
- snap8
- snip8
- snit5
- snot5
- soap7
- soar4
- sofa7
- soft7
- sora4
- sori4
- sorn5
- sort4
- soup8
- sour5
- span8
- spar7
- spat7
- spic10
- spin8
- spit7
- spot7
- spun9
- spur8
- star4
- stir4
- stoa4
- stop7
- stun6
- suit5
- sura5
- surf8
- taco7
- tain5
- tans5
- taos4
- taps7
- tarn5
- taro4
- tarp7
- tars4
- taus5
- tics7
- tins5
- tipi7
- tips7
- tiro4
- tofu8
- tons5
- topi7
- tops7
- tora4
- torc7
- tori4
- torn5
- tors4
- tour5
- trap7
- trio4
- trip7
- trop7
- tsar4
- tufa8
- tuis5
- tuna6
- tuns6
- tups8
- turf8
- turn6
- unai6
- unci9
- unco9
- unit6
- unto6
- upas8
- upon9
- uric8
- urns6
- ursa5
- utas5