4 letters
- opal8
- open8
- oral5
- orca7
- orle5
- paca10
- pace10
- pail8
- pain8
- pair7
- pale8
- palp11
- pane8
- papa10
- para7
- pare7
- peal8
- pean8
- pear7
- pech12
- pein8
- peon8
- pepo10
- peri7
- perp10
- phon10
- pial8
- pian8
- pica10
- pice10
- pier7
- pile8
- pina8
- pine8
- pion8
- pipe10
- pirn8
- plan9
- plea8
- pleb11
- plie8
- plop11
- pole8
- pone8
- pope10
- pore7
- porn8
- prao7
- prep10
- proa7
- prop10
- race7
- raia4
- rail5
- rain5
- rale5
- rani5
- rape7
- real5
- reap7
- rein5
- repo7
- repp10
- rhea6
- rial5
- rice7
- rich9
- riel5
- rile5
- ripe7
- roan5
- robe7
- roil5
- role5
- rope7