| coadunation(noun, agreement, combination, accord, harmony) |
| coalition(support, help, aid, service, assistance) |
| collaboration(noun, support, help, aid, service) |
| combination(noun, support, help, aid, agreement) |
| combined effort(expression, support, help, aid, service) |
| coming together(noun, expression, agreement, combination, accord) |
| commixture(noun, agreement, combination, accord, compound) |
| common assent |
| communion(support, help, aid, service, assistance) |
| company(support, help, aid, service, assistance) |
| compound(noun, agreement, combination, accord, amalgamation) |
| comradeship(noun, support, agreement, harmony, unity) |
| concatenation(noun, agreement, combination, accord, compound) |
| conciliation(noun, agreement, combination, accord, harmony) |
| concurrency |
| confederacy(support, help, aid, service, assistance) |
| confederation(noun, support, help, aid, agreement) |
| confluence(noun, agreement, combination, accord, compound) |
| confluence of minds(expression, idiom) |
| confunction(support, help, aid, service, assistance) |