| coextending |
| coextensive |
| cognate(adjective, joint, linked, combined, homogeneous) |
| collateral |
| collective(adjective, joint, linked, combined, homogeneous) |
| commensurate(adjective, calm, smooth, flat, plain) |
| common(adjective, calm, smooth, flat, plain) |
| comparable(adjective, calm, smooth, flat, plain) |
| concerted(adjective, joint, linked, combined, homogeneous) |
| concordant(adjective, united, linked, homogeneous, cooperative) |
| concurrent |
| confederated(adjective, united, linked, homogeneous, cooperative) |
| congruent(adjective, joint, linked, combined, homogeneous) |
| conjoint(adjective, joint, linked, combined, homogeneous) |
| conjugate(adjective, joint, united, linked, homogeneous) |
| conjunctive(adjective, united, linked, homogeneous, cooperative) |
| consistent(adjective, calm, smooth, flat, plain) |
| consolidated(adjective, joint, linked, combined, homogeneous) |
| constant(adjective, calm, smooth, flat, plain) |
| continuous(adjective, calm, smooth, flat, plain) |