Common words:
* PENCIL
* PLANTS
* PLATES
* POORLY
* PRAYER
* PROMIS
* PULSES
* PYTHON
* POLICE
* PUDDLE
Less common words:
* PHASES
* PHOENIX
* PROVERB
* PARENTS
* PIGEONS
* PRAYERS
* PATENTS
* PALACES
* PHRASES
Let me know if you'd like more, or if you have a specific theme in mind!