| marriage(noun, balance, equal, equivalent, counterpart) |
| mating(noun, balance, equal, equivalent, counterpart) |
| name of game(noun, expression, idiom, peer, counterpart) |
| name of tune(noun, expression, idiom, peer, counterpart) |
| nature of beast(noun, expression, idiom, peer, counterpart) |
| opponent(noun, like, balance, equal, double) |
| opposite number(noun, expression, peer, counterpart, ardency) |
| pair(noun, balance, equal, equivalent, counterpart) |
| pairing(noun, balance, equal, equivalent, counterpart) |
| parity |
| partner(noun, balance, equal, equivalent, counterpart) |
| partnership(noun, balance, equal, equivalent, counterpart) |
| peas in a pod(noun, expression, idiom, peer, counterpart) |
| proportion |
| relationship |
| replica(noun, balance, equal, double, equivalent) |
| repro |
| ringer(noun, balance, equal, double, equivalent) |
| rival(noun, like, balance, equal, double) |
| rounding-off |