| club together(verb, phrasal verb, cooperation) |
| coaction(support, help, aid, service, assistance) |
| coadjute(verb, help, play, agree, aid) |
| cofunction(verb, meet, unite, combine, mix) |
| combined(adjective, concurrent) |
| combined effort(expression, support, help, aid, service) |
| come to a conclusion(expression, idiom, end, fix, clear) |
| come to a decision(expression, idiom, end, fix, clear) |
| come to an agreement(expression, idiom, end, fix, clear) |
| come to terms(expression, idiom, place, set, determine) |
| community(agreement, harmony) |
| compatibility(noun, union, accord, harmony, conformity) |
| comply with(expression, help, play, agree, aid) |
| composition(noun, music, piece, arrangement, harmony) |
| compromise(verb, place, determine, promote, plan) |
| concentus(noun, arrangement, harmony, composition, tune) |
| concerto(noun, music) |
| conduce(verb, help, play, agree, aid) |
| confederate |
| congruence(noun, agreement, deal, settlement, consistency) |