| Abbreviation | Definition |
|---|---|
| ACK | Anglican Church of Kenya |
| ACK | Arbeitsgemeinschaft Christlicher Kirchen |
| ACKM | Advancing Christ Kingdom Minstries |
| ACL | Academy for Church Leadership |
| ACL | Association of Christian Librarians |
| ACL | Authentic Christian Living |
| ACLA | Austin Christian Leadership Academy |
| ACLN | Abbotsford Christian Leaders Network |
| ACLU | Anti Christ Lecherous Unforgiven |
| ACM | Anti Cult Movement |
| ACMC | Allentown Congregational Methodist Church |
| ACMI | Association For Christians Ministering To Internationals |
| ACMTC | Aggressive Christianity Missionary Training Corps |
| ACMTC | Aggressive Christianity Missions Training Corps |
| ACMV | Aboriginal Catholic Ministry Victoria |
| ACN | Alt Christnet Nudism |
| ACNG | Austin Christian Networking Group |
| ACOC | Ancient Celtic Orthodox Church |
| ACOG | A Child Of God |
| ACON | African Christians Organization Network |