plate pilot proof plain plumb place prime prize print prance pants
prize
primo
phony
Parka, panda, pizza, plaza...
jalap, jalop, julep
Some 10 letter P words:partialityparticularpermissionpersonallyprecautionpresupposepronouncedproportionprejudicedproportionprefermentprepaymentpreachmentplacementspracticingpercentileproductivepermissiveprovisionsprotectionprovention
It could be: 'super'
preposterous
procrastinate
pepperoni
Primper.
pi