| Rank | Abbreviation | Meaning |
|---|
| ***** | NWCA | Nordic Walking Coach Association
| |
| ***** | NWCA | Nordic Water Cooler Association
| |
| **** | NWCA | National Wrestling Coaches Association
| |
| *** | NWCA | North West Cricket Association Inc.
| |
| *** | NWCA | Navy Wives Club of America
| |
| *** | NWCA | North West Calligraphy Association
| |
| *** | NWCA | Native Writers’ Circle of the Americas
| |
| *** | NWCA | Nebraska Weed Control Association
| |
| ** | NWCA | Nuclear Weapons and Counterproliferation Agency
| |
| ** | NWCA | North West Corvette Association
| |
| ** | NWCA | NCAR Winds and Confidence Algorithm
| |
| ** | NWCA | Net Working Capital Assets
| |
| ** | NWCA | North Westside Communities Association
| |
| ** | NWCA | Northwest Computer Accessories, Inc.
| |
| ** | NWCA | North West Coaches Association
| |
| * | NWCA | North West CruiseShip Association
| |
| * | NWCA | North-West Composers Association
| |
| * | NWCA | Northwest Cashmere Association
| |
| * | NWCA | Nebraska Workers Compensation Act
| |
| * | NWCA | National Wetland Condition Assessment
| |
| * | NWCA | National Writing Center Associations
| |
| * | NWCA | National Wetlands Conservation Awards
| |
| * | NWCA | North West Cooperative Association
| |
| * | NWCA | National Wood Carvers Association
| |
| * | NWCA | North West Customs Administration
| |