| coaction(support, help, aid, service, assistance) |
| coalescing(noun, concern, attention, vision, concentration) |
| collectivity(noun, entity, body, total, piece) |
| collocation(noun, join, connection, combine, link) |
| colloid |
| combined effort(expression, support, help, aid, service) |
| communication |
| company(noun, organization, business, support, help) |
| concomitance(conjunction, union, tie, bond, accompaniment) |
| concordance(union, tie, bond) |
| concourse(noun, join, connection, combine, link) |
| confection(cross, mix, blend, assortment) |
| conflux(coupling, liquification, liquefaction) |
| congregation(noun, set, body, group, concern) |
| conjoining(noun, union, amalgamation) |
| convergence(noun, join, concern, connection, combine) |
| cooperative(noun, organization, business, company, body) |
| correspondence(conjunction, accompaniment, coexistence) |
| crew(noun, organization, business, company, set) |
| crowd(noun, organization, company, set, group) |