| coadunate(joint, linked, combined, homogeneous, cooperative) |
| coextensive(adjective, close, equal, parallel, similar) |
| cognizable(adjective, recognisable) |
| collateral relative |
| collective(joint, linked, combined, homogeneous, cooperative) |
| combined(adjective, involved, bound, joint, united) |
| commensurate(adjective, close, equal, parallel, similar) |
| complement |
| complementary(adjective, similar, linked, relevant, connected) |
| concerning(important, significant, related, applicable, germane) |
| concerted(joint, linked, combined, homogeneous, cooperative) |
| concomitant(adjective, similar, collateral, attendant, linked) |
| concordant(adjective, joint, collateral, attendant, linked) |
| concurrent(adjective, like, even, similar, identical) |
| confederated(involved, joint, united, linked, homogeneous) |
| conformant(important, significant, related, applicable, germane) |
| congenator |
| congruent(joint, linked, combined, homogeneous, cooperative) |
| congruous(applicable, germane, pertinent) |
| conjoint(joint, linked, combined, homogeneous, cooperative) |