- pinon nut
- Platanus orientalis
- Paprilus alepidotus
- Poronotus triacanthus
- plane wart
- president coolidge
- particular baptist
- platymiscium trinitatis
- Polystichum lonchitis
- Polystichum scopulinum
- prickly shield fern
- Polystichum braunii
- Platycerium
- Pellaea
- Pteridium
- Pityrogramma
- Polypodium
- Polystichum
- Phegopteris
- Pleurosorus
- Pteretis
- Pilularia
- Polybotria
- Polybotrya
- Pteris
- Phyllitis
- Parathelypteris
- Psilotum
- pilaff
- pilary
- pancreatic fistula
- periodontal disease
- polyarteritis nodosa
- pseudorubella
- periarteritis nodosa
- papilledema
- periodic edema
- pyelonephritis
- paresis
- paralysis agitans
- proteomics
- pharmacogenetics
- paternal uncle's wife
- paternalistic
- provincial capital
- Portuguese cypress
- periactin
- pond apple
- pond_apple tree
- prickly custard apple