A cornucopia is a horn-of-plenty which overflows with foodstuffs (or sometimes other symbols of abundance), so any foods that begin with a "p" might be in there, for example, pumpkins or Pears.
Or, it could be that you are searching for a more general term for the contents of a cornucopia as a whole, in which case you might be looking for the word produce.
Pineapples :(
pillow
Pina colada.
pants
It's pickles
Pessimistic is a synonym for something bad happening. It begins with p.
Pina Colada
pontoon boat
Pencil Piano
Verbs beginning with 'P' Paint Pin Pry Poke Hope this helps :)
Pinehurst is a golf resort in North Carolina. It begins with the letter P.
a pianoPark Avenue (a car)penthousepatio door