| A | B |
| prima donna | a person who is easily hurt or upset or is stuck-up |
| primary | first in time or development |
| primate | any of an order of mammals including human beings, apes, |
| primer | a book of first instructions in a subject |
| primeval | belonging to the earliest time |
| primitive | of or relating to the earliest age or period |
| primogenitor | ancestor or forefather |
| prince | a son or grandson of a monarch : a male member of a royal |
| principal | most important : CHIEF |
| principle | a general or basic truth on which other truths or theories can |
| protagonist | the chief character in a play, novel, or story |
| protein | any of numerous nitrogen-containing substances that consist of chains of amino acids, are important parts of all living cells, are a part of the human diet and can be found in meat, fish and eggs |
| protocol | an original copy or record of a document |
| protoplasm | a mixture of protein, various organic and inorganic substances, |