sort by Rank | Alpha
| Possible Meanings | Rank |
| National Summertime Pack Award | **** |
| National Systems of Protected Areas | **** |
| Non Smoker Protection Act | *** |
| Northeast Spa Pool Association | *** |
| National Strategic Plan of Action | *** |
| North Star Pet Assistance | *** |
| National Strategy for Poverty Alleviation | *** |
| National Spatial Planning Agency | *** |
| National Strategy and Plan of Action | *** |
| National Scholarship Providers Association | *** |
| Not So Purrrfect Angels | *** |
| Nova Scotia Printmakers Association | *** |
| National System for Protected Areas | *** |
| Non Specific Protein Adsorption | *** |
| National Socialist Party of America | *** |
| National Social Partnership Agreement | ** |
| Neisserial surface protein A | ** |
| National Sports Performance Association | ** |
| National Strength Professional Association | ** |
| Needlestick Safety Prevention Act | ** |
| Nevada Strategic Planning Authority | ** |
| National Sorghum Producers Association | ** |
| Netherlands School of Public Administration | ** |
| Non Support Punishment Act | ** |
| National Security Planning Agency | ** |
| National Society for the Protection of Animals | ** |
| National Standard Parts Associates | ** |
| National System of Protected Areas | ** |
| National Socialist Party of Australia | ** |
| Nova Scotia Parachute Association | ** |
| National Society of Professional | ** |
| National State Publishing Association | ** |
| Northumberland Salmon Protection Association | ** |
| Near Southwest Preparedness Alliance | ** |
| Nova Scotia Pension Agency | ** |
| National Student Press Association | ** |
| Nebraska School Psychology Association | ** |
| Number of Segments per Atom | ** |
| National Shared Parenting Association | ** |
| National School Psychologists Association | ** |
| National Strategy on Poverty Alleviation | ** |
| Natural Science Publishers Association | ** |
| Natural Streams Preservation Act | ** |
| Nevada State Psychological Association | ** |
| North Shore Progress Association | * |
| National School Press Association | * |
| National Security Planning Associates | * |
| Napa Solano Psychological Association | * |
| Natural Scenery Protection Area | * |
| Nova Scotia Psychiatric Association | * |
| National Stolen Properties Act | * |
| National Strength and Professionals Association | * |
| National Show Pig Association | * |
| National School of Public Administration | * |
| North Shore Professional Association | * |