| Abbreviation | Definition |
|---|---|
| CNMA | California Nurse Midwives Association |
| CNMA | Canadian National Millers Association |
| CNMA | Colorado National Monument Association |
| CNNA | Coalition of Norwalk Neighborhood Associations |
| CNNA | Coalition of Norwalk Neighborhoods Association |
| CNPA | Carolina Nature Photographers Association |
| CNPA | Connecticut Naturopathic Physicians Association |
| CNSA | California Nevada Snowmobile Association |
| CNSA | Central Negros Shooters Association |
| CNSA | Chinese Neurotrauma Scholar Association |
| CNSA | Coronado Navy Swim Association |
| CNTA | Central Nova Tourist Association |
| CNYAPG | Central New York Association of Professional Geologists |
| COA | Colorado Optometric Association |
| COA | Connecticut Ornithological Association |
| COA | Container Owners Association |
| COAA | Carousel Organ Association of America |
| COAA | Central Ontario Art Association |
| COAA | Central Ontario Art Association's |
| COAA | Central Oregon Avalanche Association |