| carbon copy(expression, adjective, like, equal, even) |
| clone(adjective, like, exact, equal, double) |
| coextensive(adjective, close, equal, near, adequate) |
| coincident(adjective, like, equal, parallel, consistent) |
| collatable |
| common(adjective, calm, smooth, flat, plain) |
| comparably |
| comparison |
| complementary(adjective, like, parallel, consistent, similar) |
| concurrent(adjective, like, even, similar, identical) |
| conforming(adjective, close, equal, near, parallel) |
| confusable |
| congeneric(adjective, close, equal, near, parallel) |
| congenerous(adjective, close, equal, near, parallel) |
| connate(adjective, parallel, similar, alike, related) |
| connected(adjective, reasonable, like, fair, similar) |
| connective |
| constant(adjective, calm, smooth, flat, plain) |
| continuous(adjective, calm, smooth, flat, plain) |
| contrasting(adjective, comparative) |