| 1. | prime minister, the most senior minister of a cabinet | 7 | ↑ | ↓ |
| 2. | Perl module, a discrete component of software for the Perl programming language | 6 | ↑ | ↓ |
| 3. | phase modulation, in electrical engineering | 6 | ↑ | ↓ |
| 4. | post meridiem (also written P.M. and p.m.), Latin for 'after noon', used to disambiguate hours of the day in the twelve-hour clock system | 6 | ↑ | ↓ |
| 5. | post mortem, a medical examination carried out after death | 6 | ↑ | ↓ |
| 6. | petametre, a length unit (1015 m) (Pm) | 5 | ↑ | ↓ |
| 7. | Polar Medal, a medal awarded by the Sovereign of the United Kingdom | 5 | ↑ | ↓ |
| 8. | postmaster, the head of an individual post office | 5 | ↑ | ↓ |
| 9. | Power Machines or Silmash, a Russian industrial company | 5 | ↑ | ↓ |
| 10. | precious metal, a rare metallic chemical element of high economic value | 5 | ↑ | ↓ |
| 11. | project manager or project management, the discipline of organizing and managing resources | 5 | ↑ | ↓ |
| 12. | The Peoples of Middle-earth by Christopher Tolkien | 5 | ↑ | ↓ |
| 13. | Past Master Degree | 4 | ↑ | ↓ |
| 14. | Pere Marquette Railway (Association of American Railroads reporting mark PM) | 4 | ↑ | ↓ |
| 15. | perpetual motion, refers to movement that goes on forever | 4 | ↑ | ↓ |
| 16. | Perry Mason, a fictional defense attorney | 4 | ↑ | ↓ |
| 17. | picometre, a length unit (10-12 m) (pm) | 4 | ↑ | ↓ |
| 18. | pilot monitoring | 4 | ↑ | ↓ |
| 19. | PM (ABC Radio), an ABC Radio national news magazine programme | 4 | ↑ | ↓ |
| 20. | Polymyositis | 4 | ↑ | ↓ |
| 21. | Popular Mechanics, an American magazine devoted to science and technology | 4 | ↑ | ↓ |
| 22. | powdery mildew, a fungal disease that affects a wide range of plants | 4 | ↑ | ↓ |
| 23. | preventive maintenance, preventative maintenance or proactive maintenance, the care and servicing of equipment for the purpose of maintaining it in satisfactory operating condition | 4 | ↑ | ↓ |
| 24. | Principia Mathematica, a three-volume work on the foundations of mathematics | 4 | ↑ | ↓ |
| 25. | promethium, chemical element number 61 (Pm) | 4 | ↑ | ↓ |
| 26. | Pubblico Ministero, an Italian magistrate's office | 4 | ↑ | ↓ |
| 27. | Tropic Air IATA airline designator | 4 | ↑ | ↓ |
| 28. | Altria Group, previously named 'Phillip Morris' | 3 | ↑ | ↓ |
| 29. | P.M. (author), an anonymous Swiss author | 3 | ↑ | ↓ |
| 30. | palm mute, in guitar tablature | 3 | ↑ | ↓ |
| 31. | particulate matter, fine dust and soot suspended in the air | 3 | ↑ | ↓ |
| 32. | permanent magnet, an object which stays magnetised without external effort | 3 | ↑ | ↓ |
| 33. | personal message or private message, in the context of bulletin board systems and Internet forums | 3 | ↑ | ↓ |
| 34. | Pistolet Makarova, a semi-automatic pistol designed in the late 1940s | 3 | ↑ | ↓ |
| 35. | plasma membrane, is a selectively permeable lipid bilayer found in all cells | 3 | ↑ | ↓ |
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| 1 . 2 (35/42) |
