| commutual(adjective, interchangeable, proportionate, homologous, socialistic) |
| complementary(adjective, interchangeable, proportionate, homologous, socialistic) |
| completory(adjective, interchangeable, proportionate, homologous, socialistic) |
| concordant(adjective, interchangeable, proportionate, homologous, socialistic) |
| conformant(adjective, interchangeable, proportionate, homologous, socialistic) |
| congruous(adjective, interchangeable, proportionate, homologous, socialistic) |
| conjunct(adjective, interchangeable, proportionate, homologous, socialistic) |
| consonant(adjective, interchangeable, proportionate, homologous, socialistic) |
| contact printer(expression, idiom) |
| coordinate(adjective, interchangeable, proportionate, homologous, socialistic) |
| copiers |
| copy(noun, adjective, reproduction, model, equal) |
| copy machine(noun, machine) |
| copyholder |
| correlative(adjective, equal, similar, identical, same) |
| correspondent(adjective, equal, similar, identical, same) |
| corresponding(adjective, equal, similar, identical, same) |
| coterminus(adjective, interchangeable, proportionate, homologous, socialistic) |
| creator |
| cribber |