pickle
purple
pueblo
porter
potter
poster
apiece
* poetic * poniac
phobia
Some 10 letter P words:partialityparticularpermissionpersonallyprecautionpresupposepronouncedproportionprejudicedproportionprefermentprepaymentpreachmentplacementspracticingpercentileproductivepermissiveprovisionsprotectionprovention
Apache, apathy, appeal, append, apples and aprons are 6 letter words that begin with the letters AP.
preposterous
procrastinate
Primper.
pepperoni
pi
phenomenal
There are no 23 letter words in the English language starting with the letter p.