- Pacemaker... to Palilalia...
- Palindromic... to Pancytolysis...
- Pancytopenia... to Papanicolaou...
- Papilledema... to Paragranuloma...
- Parahemophilia... to Paraplegia...
- Paraproteinemia... to Paresis...
- Paresthesia... to Parsonage...
- Parsonage... to Patterned...
- Patulous... to Pelade...
- Pelger... to Penis...
- Penitis... to Pericementitis...
- Pericholecystitis... to Perinephric...
- Perinephritic... to Perirectal...
- Perirenal... to Perivesiculitis...
- Perlèche... to Petrellidosis...
- Petrositis... to Pharynx...
- Phase... to Phocomelia...
- Phoria... to Phycomycosis...
- Physalopteriasis... to Piles...
- Pili... to Pinta...
- Pintid... to Plasmacytopenia...
- Plasmacytosis... to Plicated...
- Plug... to Pneumocystosis...
- Pneumoenteritis... to Pneumosiderosis...
- Pneumothorax... to Pollinosis...
- Pollitzer... to Polymenorrhea...
- Polymicrogyria... to Polythelia...
- Polytrichia... to Position...
- Positive... to Posthemorrhagic...
- Posthepatitis... to Posttraumatic...
- Posttraumatic... to Preachers...
- Preauricular... to Premenstrual...
- Premenstrual... to Prickling...
- Prickly... to Prodromal...
- Profichet... to Prostatism...
- Prostatitis... to Psammocarcinoma...
- Pseudarthrosis... to Pseudocyesis...
- Pseudocyst... to Pseudoinsomnia...
- Pseudoleukemia... to Pseudoretinitis...
- Pseudorickets... to Psorospermosis...
- Psychalgia... to Pubarche...
- Pubertas... to Pupillotonia...
- Purpura... to Pyelonephrosis...
- Pyelophlebitis... to Pyodermatitis...
- Pyomyositis... to Pyuria...