| double(adjective, part, double, pair, twin) |
| dual(adjective, part, double, second, twin) |
| binary(adjective, part, double, second, twin) |
| duplex(adjective, part, spare, equal, double) |
| duplicate(adjective, part, spare, double, identical) |
| twofold(adjective, part, spare, equal, double) |
| twin(adjective, spare, equal, double, identical) |
| geminate(adjective, part, second, burlesqued, dual) |
| dualistic(adjective, spare, equal, double, identical) |
| second(adjective, double, dual, twofold) |
| bilateral(adjective, double) |
| paired(adjective, double, second, twin, dual) |
| two-faced(adjective, double) |
| two-sided(adjective, double) |
| bivalent |
| doubled |
| treble |
| twice(adjective, double, second, dual, two) |
| two-fold(adjective, double) |
| two-ply |