| congruous(adjective, interchangeable, proportionate, homologous, socialistic) |
| conjoined with(expression, adjective, collateral, attendant, joined) |
| connecting(reaching, coterminous, centrolineal, confluent, coalescent) |
| consentient(coterminous, centrolineal, connecting) |
| consonant(adjective, interchangeable, proportionate, homologous, socialistic) |
| consubstantial(adjective, similar) |
| copier(adjective, interchangeable, proportionate, homologous, socialistic) |
| correspondingly |
| coterminous(adjective, collateral, attendant, joined, reaching) |
| coterminus(adjective, interchangeable, proportionate, homologous, socialistic) |
| coupled |
| coupled with(expression, adjective, collateral, attendant, joined) |
| ending at(expression, reaching, confluent, coalescent) |
| equal(adjective, joint, interchangeable, proportionate, homologous) |
| evenly matched(expression, adjective, interchangeable, proportionate, homologous) |
| exercise-related(coefficient, synergetic) |
| federal |
| fifty-fifty(adjective, interchangeable, proportionate, homologous, socialistic) |
| filling |
| fit(adjective, interchangeable, proportionate, homologous, socialistic) |