List of opposite number synonyms and opposite number related words.
antipode, antipodes, antipole, antithesis, antonym, coequal, compeer, complement, contra, converse, coordinate, counter, counterbalance, countercheck, counterpart, counterpoint, counterpoise, counterpole, counterterm, cousin, ditto, equal, equipollent, equivalent, fellow, foil, inverse, like, match, mate, obverse, offset, opposite, parallel, peer, reverse, rival, setoff, tally, the contrary, the other side, twin, vis-a-vis