| concert(verb, participate, cooperate) |
| conclave(association, gathering, meeting) |
| concourse(noun, union, meeting, confluence) |
| concurrent(adjective, meeting, coming, coterminous, confronting) |
| confab(association, gathering, meeting) |
| confederation(combination, union, amalgamation) |
| conference(association, gathering, meeting) |
| conferring(adjective, coterminous, confronting, centrolineal) |
| confronting(adjective, coterminous, centrolineal) |
| congregate(verb, meet, gather, goose, muster) |
| congress(verb, raise, association, gathering, meeting) |
| conjoining(combination, union, amalgamation) |
| connecting(adjective, meeting, reaching, confluent, coalescent) |
| connection(combination, union, amalgamation) |
| consentient(adjective, coming, coterminous, confronting, centrolineal) |
| consortium(merger, coupling, liquification, liquefaction, symbiosis) |
| contactual(adjective, coterminous, confronting, centrolineal) |
| contiguous(adjective, coterminous, confronting, centrolineal) |
| continuity(amalgamation, liquification) |
| continuousness(amalgamation, liquification) |