procrastinate
Parliamentary
Some 10 letter P words:partialityparticularpermissionpersonallyprecautionpresupposepronouncedproportionprejudicedproportionprefermentprepaymentpreachmentplacementspracticingpercentileproductivepermissiveprovisionsprotectionprovention
preposterous
Primper.
pepperoni
pi
phenomenal
There are no 23 letter words in the English language starting with the letter p.
presentationpassionatelyperformancespreventativeprogrammablepreconceivedpreconditionpreservationperforationsprescriptionprepositionsproportionedpenalizationpreauthorizepalpitationspersonality
prize
plaza
Plundering