4 letters
- pics10
- pier7
- pies7
- pile8
- pina8
- pine8
- pins8
- pirn8
- plan9
- plea8
- pleb11
- plie8
- plus9
- prau8
- pubs11
- puce11
- pula9
- pule9
- puli9
- puls9
- puna9
- puns9
- pure8
- puri8
- purl9
- purs8
- race7
- rail5
- rain5
- rale5
- rani5
- rape7
- raps7
- rase4
- rasp7
- real5
- reap7
- rebs7
- recs7
- rein5
- reis4
- reps7
- rial5
- rias4
- ribs7
- rice7
- riel5
- rile5
- rins5
- ripe7
- rips7
- rise4
- rube8
- rubs8
- rues5
- ruin6
- rule6
- rune6
- runs6
- ruse5
- sabe7
- sail5
- sain5
- sale5
- salp8
- sane5
- sari4
- saul6
- scab10
- scan8
- scar7
- scup11
- seal5
- sear4
- sera4
- sial5
- sice7
- sine5
- sipe7
- sire4
- slab8
- slap8
- slip8
- slub9
- slue6
- slur6
- snap8
- snib8
- snip8
- snub9
- spae7
- span8
- spar7
- spec10
- spic10
- spin8
- spue8
- spun9
- spur8
- suba8
- suer5
- supe8
- sura5
- sure5
- ulan7
- ulna7
- unai6
- unbe9
- unci9
- upas8
- urbs8
- urea5
- uric8
- urns6
- ursa5
- user5