| coadjuvant(reaching, confluent, coalescent) |
| coalescent(reaching, confluent) |
| coefficient(adjective, collateral, attendant, reaching, kindred) |
| cognated(adjective, collateral, attendant, kindred, congeneric) |
| coincided |
| coincident(adjective, collateral, interchangeable, attendant, proportionate) |
| collegial(reaching, confluent, coalescent) |
| combining(reaching, confluent, coalescent) |
| coming together(expression, reaching, confluent, coalescent) |
| communicated |
| communistic(adjective, interchangeable, proportionate, homologous, socialistic) |
| commutable(adjective, interchangeable, proportionate, homologous, socialistic) |
| comparable(adjective, consistent, equivalent, agreeing, matching) |
| complemental |
| complicated |
| concordant(adjective, collateral, interchangeable, attendant, proportionate) |
| confirmatory(adjective, collateral, attendant, kindred, congeneric) |
| confluent(reaching, coalescent) |
| conformant(adjective, organized, interchangeable, proportionate, homologous) |
| conforming(adjective, consistent, agreeing) |