The Collaborative International Dictionary of English v.0.48:

Reproach \Re*proach"\ (r?-pr?ch"), v. t. [imp. & p. p.
   Reproached (-pr?cht"); p. pr. & vb. n. Reproaching.] [F.
   reprocher, OF. reprochier, (assumed) LL. reproriare; L. pref.
   re- again, against, back + prope near; hence, originally, to
   bring near to, throw in one's teeth. Cf. Approach.]
   1. To come back to, or come home to, as a matter of blame; to
      bring shame or disgrace upon; to disgrace. [Obs.]
      [1913 Webster]

            I thought your marriage fit; else imputation,
            For that he knew you, might reproach your life.
                                                  --Shak.
      [1913 Webster]

   2. To attribute blame to; to allege something disgraceful
      against; to charge with a fault; to censure severely or
      contemptuously; to upbraid.
      [1913 Webster]

            If ye be reproached for the name of Christ. --1
                                                  Peter iv. 14.
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            That this newcomer, Shame,
            There sit not, and reproach us as unclean. --Milton.
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            Mezentius . . . with his ardor warmed
            His fainting friends, reproached their shameful
            flight.
            Repelled the victors.                 --Dryden.
      [1913 Webster]

   Syn: To upbraid; censure; blame; chide; rebuke; condemn;
        revile; vilify.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Reproach \Re*proach"\, n. [F. reproche. See Reproach, v.]
   [1913 Webster]
   1. The act of reproaching; censure mingled with contempt;
      contumelious or opprobrious language toward any person;
      abusive reflections; as, severe reproach.
      [1913 Webster]

            No reproaches even, even when pointed and barbed
            with the sharpest wit, appeared to give him pain.
                                                  --Macaulay.
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            Give not thine heritage to reproach.  --Joel ii. 17.
      [1913 Webster]

   2. A cause of blame or censure; shame; disgrace.
      [1913 Webster]

   3. An object of blame, censure, scorn, or derision.
      [1913 Webster]

            Come, and let us build up the wall of Jerusalem,
            that we be no more a reproach.        --Neh. ii. 17.
      [1913 Webster]

   Syn: Disrepute; discredit; dishonor; opprobrium; invective;
        contumely; reviling; abuse; vilification; scurrility;
        insolence; insult; scorn; contempt; ignominy; shame;
        scandal;; disgrace; infamy.
        [1913 Webster]

WordNet (r) 3.0 (2006):

reproach
    n 1: a mild rebuke or criticism; "words of reproach"
    2: disgrace or shame; "he brought reproach upon his family"
    v 1: express criticism towards; "The president reproached the
         general for his irresponsible behavior" [syn: reproach,
         upbraid]

Moby Thesaurus II by Grady Ward, 1.0:

173 Moby Thesaurus words for "reproach":
   accusal, accusation, accuse, accusing, admonish, admonishment,
   admonition, allegation, allege, allegement, anathematize,
   anathemize, animadvert on, arraign, arraignment, article,
   aspersion, attaint, badge of infamy, bar sinister, baton,
   bend sinister, bill of particulars, black eye, black mark, blame,
   blot, blur, book, brand, bring accusation, bring charges,
   bring into discredit, bring low, bring shame upon, bring to book,
   bringing of charges, bringing to book, broad arrow, burning shame,
   byword, byword of reproach, call down, call to account,
   cast blame upon, cast reflection upon, cast reproach upon,
   castigation, censure, champain, charge, chastisement, chide,
   chiding, cite, complain, complain against, complaint, condemn,
   correction, count, cry down, cry out against, cry out on,
   cry shame upon, damn, debase, decry, defrock, degrade, delation,
   denounce, denouncement, denunciate, denunciation, deplume,
   dirty shame, discredit, disgrace, dishonor, disparagement,
   displume, fasten on, fasten upon, finger, fulminate against,
   hang something on, humiliate, humiliation, impeach, impeachment,
   implication, imply, impugn, imputation, impute, impute shame to,
   indict, indictment, inform against, inform on, information,
   innuendo, insinuate, insinuation, inveigh against, lawsuit,
   lay charges, laying of charges, lecture, lesson, lodge a complaint,
   lodge a plaint, low-down dirty shame, mark of Cain, objurgation,
   onus, pillory, pillorying, pin on, plaint, point champain,
   prefer charges, press charges, prosecution, put on report,
   put to shame, rap, rating, rebuke, reflect discredit upon,
   reflect upon, reflection, report, reprehend, reprehension,
   reprimand, reprobate, reprobation, reproof, reproval, scandal,
   scolding, sermon, shake up, shame, slur, smear, smirch, smudge,
   smutch, spanking, spot, stain, stigma, stigmatism, stigmatization,
   suit, taint, take to task, tarnish, task, taunt with, tax, taxing,
   tick off, true bill, twit, unfrock, unspoken accusation,
   upbraiding, veiled accusation, wig