4 letters
- puts8
- raia4
- rail5
- rain5
- rami7
- ramp10
- rams7
- rani5
- rant5
- raps7
- rapt7
- rasp7
- rats4
- rial5
- rias4
- rims7
- rins5
- rips7
- ruin6
- rump11
- rums8
- runs6
- runt6
- rust5
- ruts5
- sail5
- sain5
- salp8
- salt5
- samp10
- sari4
- sati4
- saul6
- scam10
- scan8
- scar7
- scat7
- scum11
- scup11
- scut8
- sial5
- silt5
- sima7
- simp10
- slam8
- slap8
- slat5
- slim8
- slip8
- slit5
- slum9
- slur6
- slut6
- smit7
- smut8
- snap8
- snip8
- snit5
- spam10
- span8
- spar7
- spat7
- spic10
- spin8
- spit7
- spun9
- spur8
- star4
- stir4
- stum8
- stun6
- suit5
- sump11
- sura5
- tail5
- tain5
- tala5
- talc8
- tali5
- tamp10
- tams7
- tans5
- tapa7
- taps7
- tarn5
- tarp7
- tars4
- taus5
- tics7
- tils5
- tins5
- tips7
- tirl5
- tram7
- trap7
- trim7
- trip7
- tsar4
- tuis5
- tump11
- tuna6
- tuns6
- tups8
- turn6
- ulan7
- ulna7
- umps11
- unai6
- unci9
- unit6
- upas8
- uric8
- urns6
- ursa5
- utas5