4 letters
- pirn8
- plan9
- plea8
- pleb11
- pled9
- plew11
- plie8
- plug11
- plum12
- plus9
- poke11
- pole8
- pone8
- pore7
- pork11
- porn8
- pour8
- prau8
- pree7
- prep10
- prex14
- prey9
- prez16
- puce11
- puck15
- puke12
- pula9
- pule9
- puli9
- pull10
- pulp12
- puls9
- puna9
- pung11
- punk13
- puns9
- punt9
- puny11
- pure8
- puri8
- purl9
- purr8
- purs8
- pyre9
- rake8
- rale5
- rank9
- rape7
- real5
- reap7
- reck11
- reek8
- reel5
- rein5
- rely7
- rend6
- rent5
- repo7
- repp10
- reps7
- riel5
- rile5
- rink9
- ripe7
- role5
- rope7
- roue5
- roup8
- rube8
- ruck12
- rude6
- rued6
- ruer5
- rues5
- ruin6
- rule6
- ruly8
- rump11
- rune6
- rung8
- runs6
- runt6
- ruse5
- rusk9
- ryke10
- skep11
- slue6
- slur6
- spue8
- spun9
- spur8
- suer5
- sulk10
- sunk10
- supe8
- sure5
- tern5
- trek8
- true5
- tule6
- tune6
- turk9
- turn6
- ukes9
- ulan7
- ulna7
- unbe9
- unde7
- upon9
- urea5
- urge7
- urns6
- user5
- wren8
- yelk11
- yelp10
- yerk10
- yeuk11
- yule8
- zerk17