- 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 Preauricular...
- Prebetalipoproteinemia... to Premenstrual...
- Premolarization... to Prickly...
- Primary... to Profichet...
- Progeria... to Prostatitis...
- Prostatocystitis... to Pseudarthrosis...
- Pseudo... to Pseudocyst...
- Pseudodementia... to Pseudoleukemia...
- Pseudomembranous... to Pseudorickets...
- Pseudorubella... to Psychalgia...
- Psychasthenia... to Pubertas...
- Puberty... to Purpura...
- Purpuric... to Pyelophlebitis...
- Pyemia... to Pyogenic...
- Pyomyositis... to Pyuria...