| Abbreviation | Definition |
|---|---|
| CLFA | Conservative Libertarian Fiction Alliance |
| CLGA | Centre Left Grassroots Alliance |
| CMCA | Canada Mosaic Christian Alliance |
| CMGA | California middle grades alliance |
| CMSCA | Chiang Mai Schools Cricket Alliance |
| CNCA | Carbon Neutral Cities Alliance |
| COHA | California Outdoor Heritage Alliance |
| COPA | Cryptocurrency Open Patent Alliance |
| CORA | Cincinnati Off Road Alliance |
| COSA | Colorado Open Space Alliance |
| COSIA | Canadian Oil Sands Innovation Alliance |
| CPA | Clean Power Alliance |
| CPA | Community Purchasing Alliance |
| CPA | Compliant Pharmacy Alliance |
| CPAA | Central Pennsylvania Animal Alliance |
| CPAA | Colorado Plateau Archaeological Alliance |
| CPAS | Cerebral Palsy Alliance Singapore |
| CQA | Compost Quality Alliance |
| CRAE | Children's Rights Alliance for England |
| CRIA | China Robot Industry Alliance |