sort by Rank | Alpha
| Possible Meanings | Rank |
| National Bank of Austria | **** |
| North American Brewers Association | **** |
| North American Boxing Association | *** |
| National Amateur Bodybuilding Association | *** |
| North America Britain and Australia | *** |
| North American Balloon Association | *** |
| Nahrungsmittel Aus Biologischem Anbau | *** |
| National Association for Black Accountants | *** |
| National Association of Black Actors | *** |
| National Association of British Arabs | *** |
| North American Barter Association | *** |
| nuova accademia belle arti | *** |
| Native American Bar Association | *** |
| Noblesville Amateur Baseball Association | *** |
| noncompetitive avidine-biotin assay | ** |
| Newfoundland Amateur Baseball Association | ** |
| North American Basketball Association | ** |
| non-competitive avidin-biotin assay | ** |
| Northeastern Association of the Blind at Albany | ** |
| North American Baptist Association | ** |
| noncompetitive avidin-biotin immunoassay | ** |
| Nekoosa Area Business Association | ** |
| Nepean Amateur Basketball Association | ** |
| North America Boxing Association | ** |
| North Alabama Boardsailing Association | ** |
| National Association of Black Accounts | ** |
| Northland Area Business Association | ** |
| Northland Area Builders Association | ** |
| North Avenue Business Association | ** |
| National Academy of Beauty Arts | ** |
| Northern Arizona Bird Association | ** |
| NSW ACT Biathlon Association | ** |
| National Alliance of Breastfeeding Advocacy | ** |
| National Amateur Basketball Association | ** |
| National Association for Boards | ** |
| Native American Business Administration | ** |
| Nigeria Amateur Boxing Association | ** |
| National Alliance for Breastfeeding Action | ** |
| National Association Black Accountants | ** |
| North America Broadcasters Association | ** |
| North American Beer Awards | ** |
| North Akron Baseball Association | ** |
| North American Broadcaster Association | ** |
| Northeastern Association for the Blind at Albany | ** |
| National Advisory Board on AIDS | * |
| Northern Arizona Building Association | * |
| National Automobile Bankers Associates | * |
| North American Baseball Association | * |
| North Arkansas Baptist Association | * |
| Newspaper Advertising Bureau of Australia | * |
| North America Balloon Association | * |
| North American Bass Anglers | * |
| newton area business association | * |
| North American Broadcasting Association | * |
| North Atlantic Buckskin Association | * |
| National Archery Buyers Association | * |
| North American Bridal Association | * |