sort by Rank | Alpha
| Possible Meanings | Rank |
| Providence College Alumni Association | *** |
| Pakistan Civil Aviation Authority | *** |
| Parking Company of America Airports | *** |
| Pacific Coast Athletic Association | *** |
| Pennsylvania Collegiate Athletic Association | *** |
| Pancreas cancer-associated antigen | ** |
| plasma cell-associated antigens | ** |
| Preventive Cardiology Academic Award | ** |
| phenylimide of cis-aconitic acid | ** |
| Parish Councils Airport Association | ** |
| Penicuik Community Arts Association | ** |
| Philippine Chinese Association of America | ** |
| Particulate Combined Amino Acids | ** |
| Prevention of Cruelty to Animals Act | ** |
| Pancreas Cancer Associated Antigen | ** |
| Parks Canada Agency Act | ** |
| Parliamentary Committee Against Antisemitism | ** |
| Paediatric Continence Association of Australia | ** |
| Prescott College Alumni Association | ** |
| Provincial Councils and Administration Act | ** |
| Polymorphous Computing Agent Architecture | ** |
| Prevention Child Abuse America | ** |
| Polk County Aviation Authority | ** |
| Pottawatomie County Athletic Association | ** |
| Progressive Conservative Association of Alberta | ** |
| Palau Community Action Agency | ** |
| Palestinian Civil Aviation Authority | ** |
| Pedernales Creative Arts Alliance | ** |
| Pitt County Anesthesia Associates | ** |
| Precast Concrete Association of America | ** |
| Prevention of Crimes Amendment Act | ** |
| Parallel Computing Algorithms and Applications | ** |
| Purchase College Alumni Association | ** |
| Philippine Clean Air Act | ** |
| Primary Care Associates of Appleton | ** |
| Phil Carpenter and Associates | * |
| Plane Crash Aviation Attorneys | * |
| Providence Catholic Athletic Association | * |
| Patriot Corporations of America Act | * |
| Peachtree City Airport Authority | * |
| Phoenix College Alumni Association | * |
| PRIMARY CARE ANALYSIS AREAS | * |
| Pasay City Adventist Academy | * |
| Polymorphous Cognitive Agent Architecture | * |
| Praecipe for Caveat Against Arrest | * |
| Plastic Cards for All Applications | * |