The Collaborative International Dictionary of English v.0.48:

Miscarriage \Mis*car"riage\, n.
   1. Unfortunate event or issue of an undertaking; failure to
      attain a proper or desired result or reach a destination;
      as, a serious miscarriage of justice.
      [1913 Webster]

            When a counselor, to save himself,
            Would lay miscarriages upon his prince. --Dryden.
      [1913 Webster]

   2. Ill conduct; evil or improper behavior; as, the failings
      and miscarriages of the righteous. --Rogers.
      [1913 Webster]

   3. The act of bringing forth a child before the time it is
      viable; a premature birth, resulting in death of the
      fetus; spontaneous abortion.
      [1913 Webster +PJC]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "miscarriage":
   abortion, abortive attempt, breakdown, clerical error, collapse,
   corrigendum, defeat, dud, erratum, error, failing, failure, fault,
   faute, frustration, human error, merry chase, misapprehension,
   miscalculation, miscarrying, misconception, miscount, misdeal,
   misfire, misidentification, misjudgment, mismanagement, misplay,
   misprint, misquotation, misreport, miss, misstatement, mistake,
   misunderstanding, misuse, typo, typographical error, vain attempt,
   wet squib, wild-goose chase