| Abbreviation | Definition |
|---|---|
| COP | Christians On Patrol |
| COPE | Christ Offers Peace Everlasting |
| COR | Catholic Outdoor Renewal |
| COR | Council Of Orthodox Rabbis |
| CORE | Certificate Of Religious Education |
| CORE | Christian Out Reach Evangelism |
| CORE | Christian Outdoor Recreational Experiences |
| CORE | Christians On The Road To Eternity |
| CORE | Christians Organizing Respect For Everyone |
| CORE | Church On The Radical Edge |
| CORE | Community Of Religious Educators |
| CORE | Creative Open Religious Exploration |
| COROS | Collectors Of Religion On Stamps |
| CORR | Christian Organization for Relief and Rehabilitation |
| COS | Christ Our Savior |
| COS | Christian Outreach Service |
| COS | Church Of Satan |
| COS | Church Of Scientology |
| CoSEC | Communion of Saints Evangelical |
| COSM | Chapel Of Sacred Mirrors |