4 letters
- puna9
- puns9
- punt9
- puri8
- purs8
- push10
- puts8
- raia4
- rain5
- rani5
- rant5
- raps7
- rapt7
- rash6
- rasp7
- rath6
- rato4
- rats4
- rhos6
- rhus7
- rias4
- rich9
- rins5
- riot4
- rips7
- roan5
- rocs7
- rota4
- roti4
- rots4
- roup8
- rout5
- ruin6
- runs6
- runt6
- rush7
- rust5
- ruth7
- ruts5
- sain5
- sari4
- sati4
- scan8
- scar7
- scat7
- scop10
- scot7
- scup11
- scut8
- shat6
- shin7
- ship9
- shit6
- shop9
- shot6
- shri6
- shun8
- shut7
- sinh7
- sith6
- snap8
- snip8
- snit5
- snot5
- soap7
- soar4
- soph9
- sora4
- sori4
- sorn5
- sort4
- soth6
- soup8
- sour5
- span8
- spar7
- spat7
- spic10
- spin8
- spit7
- spot7
- spun9
- spur8
- star4
- stir4
- stoa4
- stop7
- stun6
- such10
- suit5
- sura5
- tach9
- taco7
- tahr6
- tain5
- tans5
- taos4
- tapa7
- taps7
- tarn5
- taro4
- tarp7
- tars4
- taus5
- than7
- thin7
- thio6
- thir6
- this6
- thou7
- thro6
- thru7
- thus7
- tics7
- tins5
- tipi7
- tips7
- tiro4
- tons5
- toph9
- topi7
- tops7
- tora4
- torc7
- tori4
- torn5
- tors4
- tosh6
- tour5
- trap7
- trio4
- trip7
- trop7
- tsar4
- tuis5
- tuna6
- tuns6
- tups8
- turn6
- tush7
- unai6
- unci9
- unco9
- unit6
- unto6
- upas8
- upon9
- uric8
- urns6
- ursa5
- utas5