| Pathological Habit Disorder | Academic & Science |
| Philosophiæ Doctor | Academic & Science |
| Post Hole Digging | Academic & Science |
| Persons Having Dreams | Academic & Science |
| Posturing, Hallucinating, Dead | Academic & Science |
| Playa Hatin Degree | Academic & Science |
| Psycotic, Hyped, Delusional | Academic & Science |
| New Philadelphia (oh) | Airport Code |
| Proactis Holdings, P.L.C. Ordinary shares | Business |
| Phonetime, Incorporated | Business |
| Post Hole Digger | Business |
| Pizza Hut Delivery | Business |
| Patented Hosel Design | Business |
| Pizza Home Delivery | Business |
| Pete Hutchinson Design | Business |
| People Hail Devil | Community |
| Pretty Heavy Dictionary | Community |
| Preach Hellfire and Damnation | Community |
| Philippino Historical Dialogue | Community |
| Pretty Holy Disciple | Community |
| Programs For Human Development | Community |
| Progress, Harmony, and Development | Community |
| Preparing His Disciples | Community |
| Pretty Hard To Do | Community |
| Professor of Harmony Development | Community |
| Penitent Halo Disciple | Community |
| Potentially Headed for Divorce | Community |
| Portable Hard Drive | Computer Hardware |
| Permanent Head Damage | Computer Hardware |
| Procedures Help Desk | Computing |
| Professional Hardware Diagnostics | Computing |
| Pocket Hard Disk | Computing |
| Portable Handheld Development | Computing |
| Portable Hard Disk | Computing |
| Professional Help Desk | Database Management |
| Process Historian Database | Database Management |
| Doctor of Philosophy | Educational Degree |
| Philosophiae Doctor | Educational Degree |
| Press Here, Dummy | Electronics |
| Polyhedra Database | File Type |
| Proper Husband Discovery | General |
| Promotion in Human Devolopment | General |
| Probably Half Demented | General |
| Project Half Done | General |
| Poor Helpless Drunk | General |
| Piled Higher and Deeper | General |
| Please Help Doctor! | General |
| Pretty Huge Deal | General |
| Prison of Hopelessness and Dispair | General |
| Pretty Hard Drinking | General |
| Pretty Handsome Dude | General |
| Passion Hunger and Discipline | General |
| Pillow Hurling Dexterity | General |
| Pour House Dallas | General |
| Professional Home Doctor | General |
| Pretty Hair Doctor | General |
| P*ssy Hyperactivity Disorder | General |
| Please Help Dying | General |
| Pre Home Dip | General |
| Power House Dance | General |
| Playa Hata's Degree | General |
| Pretty Handsome Domestic | General |
| Piled High and Deep | General |
| Premium Hot Dog | General |
| Paltry Hunka Dough | General |
| Pretty Happy Dog | General |
| Push Here, Dummy | General |
| Positively Head Damaged | General |
| Partial Head Damage | General |
| Power Hungry Dog | General |
| Perky Happy Disciple | General |
| Please Hire Desperate | General |
| Professionals Hu Dare | General |
| Pre-Historic Dinosaur | General |
| Poor, Hungry, and Determined | General |
| Pretty High Dude | General |
| Persistently and Habitually Dumb | General |
| Player Hating Degree | General |
| Permanently Head Damaged | General |
| Pretty Heavy Drinker | General |
| Pup Has Discipline | General |
| Perfect Hair-Do | General |
| Piled Higher & Deeper | General |
| Personal Hygiene Disorder | General |
| Prat of the highest Degree | General |
| P*ssy Hits Different | General |
| Piston Heads | General |
| Passed High school with Difficulty | General |
| Publicly Horrific Display | General |
| Particularly High Deception | General |
| Patent Application Information Retrieval | Governmental |
| Post-Hangover Drinking | Governmental |
| Public Highway Distance | Governmental |
| PHAPHUND | Indian Railway Station |
| Perfect Hair Day | Internet |
| Professional Hair Dresser | Jobs |
| Personal Health Data | Medical |
| Phage Host Defective | Medical |
| Pleckstrin Homology Domain | Medical |
| Potentially Harmful Drug | Medical |
| Prolyl Hydroxylase Domain | Medical |
| Pulmonary Heart Disease | Medical |
| Presbyterian Hospital of Dallas | Medical |
| Post Homicidal Depression | Medical |
| Public Health Department | Medical |
| Presbyterian Hospital Of Dallasphd | Medical |
| Physical Health Defined | Medical |
| Permanent Health Damage | Medical |
| Personal Health Diary | Medical |
| Potentially Heavy Drinker | Medical |
| Personal Health Decision | Medical |
| Purveyor of Hyped Drivel | Messaging |
| Posts A Hundred Times Daily | Messaging |
| Pretty Heavy Dude | Messaging |
| Pretty Hokey Dialogue | Messaging |
| Pretty Handsome Darling | Messaging |
| Preparation H Distributor | Messaging |
| Propitous Homely Dude | Messaging |
| Perfect Hot Date | Messaging |
| Port Hueneme Division | Military and Defence |
| P-helicity Decoupling Scheme (p=momentum) | Physics Related |
| Paint Has Dried | Real Estate |
| Port Huron and Detroit Railroad (CSX Transportation) | Regional |
| Port Huron and Detroit Railroad Company | Regional |
| Particularly Hard Dancing | Sports |
| Physical, Healthy, and Driven | Sports |
| Pure Hard Dance | Sports |
