opposite number

opposite number
    n 1: a person or thing having the same function or
         characteristics as another [syn: {counterpart}, {opposite
         number}, {vis-a-vis}]
    

43 Moby Thesaurus words for "opposite number":
      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