4 letters
- pias7
- plan9
- plat8
- play10
- plea8
- plew11
- plow11
- plug11
- plum12
- plus9
- pols8
- pour8
- pows10
- pram10
- prao7
- prat7
- prau8
- pray9
- proa7
- pros7
- prow10
- pubs11
- puds9
- pugs10
- puja17
- pula9
- pule9
- puli9
- pull10
- pulp12
- puls9
- puma11
- puna9
- puns9
- pupa11
- pups11
- pure8
- puri8
- purl9
- purr8
- purs8
- push10
- puss8
- puts8
- pyas9
- rads5
- rags6
- rail5
- rale5
- ramp10
- rams7
- rape7
- raps7
- rapt7
- rase4
- rash6
- rasp7
- rats4
- raws7
- rays6
- real5
- reap7
- reps7
- rhus7
- rial5
- rias4
- rips7
- roup8
- rows7
- rubs8
- rues5
- ruga7
- rugs7
- rule6
- ruly8
- rump11
- rums8
- runs6
- ruse5
- rush7
- rusk9
- rust5
- ruts5
- ryas6
- sail5
- sale5
- sall6
- salp8
- sals5
- salt5
- samp10
- saps7
- sard5
- sari4
- sark8
- saul6
- sawn8
- saws7
- scar7
- scup11
- seal5
- sear4
- sera4
- shaw9
- shul8
- sial5
- skua9
- slab8
- slag7
- slam8
- slap8
- slat5
- slaw8
- slay7
- slew8
- slip8
- slop8
- slow8
- slub9
- slue6
- slug8
- slum9
- slur6
- slut6
- snap8
- snaw8
- soap7
- soar4
- sola5
- sora4
- soul6
- soup8
- sour5
- spae7
- spam10
- span8
- spar7
- spas7
- spat7
- spay9
- spaz16
- spew10
- spry9
- spud9
- spue8
- spun9
- spur8
- star4
- staw7
- suba8
- suer5
- sulk10
- sulu7
- sump11
- supe8
- sups8
- sura5
- surd6
- sure5
- surf8
- swab10
- swag9
- swam10
- swan8
- swap10
- swat7
- sway9
- swop10
- swum11
- taps7
- tarp7
- tars4
- taus5
- taws7
- trap7
- tsar4
- tups8
- twas7
- ulan7
- ulna7
- ulus7
- ulva10
- umps11
- upas8
- urbs8
- urds6
- urea5
- urns6
- ursa5
- urus6
- user5
- utas5
- vars8
- vaus9
- vaws11
- wabs10
- wads8
- waes7
- wags9
- wail8