The Collaborative International Dictionary of English v.0.48:

Reputable \Rep"u*ta*ble\ (r?p"?-t?-b'l), a. [From Repute.]
   Having, or worthy of, good repute; held in esteem; honorable;
   praiseworthy; as, a reputable man or character; reputable
   conduct.
   [1913 Webster]

         In the article of danger, it is as reputable to elude
         an enemy as defeat one.                  --Broome.
   [1913 Webster]

   Syn: Respectable; creditable; estimable.
        [1913 Webster] -- Rep"u ta*ble*ness, n. --
        Rep"u*ta*bly, adv.
        [1913 Webster]

WordNet (r) 3.0 (2006):

reputable
    adj 1: having a good reputation; "a reputable business"; "a
           reputable scientist"; "a reputable wine" [ant:
           disreputable]

Moby Thesaurus II by Grady Ward, 1.0:

122 Moby Thesaurus words for "reputable":
   Christian, authoritative, blameless, celebrated, charismatic,
   charming, clean, consequential, conspicuous, creditable, decent,
   dependable, distinguished, effective, effectual, efficacious,
   eminent, enchanting, erect, esteemed, estimable, ethical,
   exceptional, extraordinary, fair, full of integrity, good,
   held in esteem, high-minded, high-principled, highly esteemed,
   highly regarded, highly reputed, highly respectable, honest,
   honorable, honored, immaculate, important, in favor, in good odor,
   in high favor, influential, inviolate, irreproachable, just,
   law-abiding, law-loving, law-revering, magnetic, manly, marked,
   memorable, meritorious, momentous, moral, noble, notable,
   noteworthy, of mark, outstanding, personable, persuasive, potent,
   powerful, prestigious, principled, prominent, pure, rare, reliable,
   remarkable, rememberable, reputed, respectable, respected, revered,
   reverend, right, right-minded, righteous, salient, signal, special,
   spotless, stainless, sterling, striking, strong, suasive,
   substantial, telling, true-dealing, true-devoted, true-disposing,
   true-souled, true-spirited, truehearted, trusted, trustworthy,
   unblemished, uncorrupt, uncorrupted, undefiled, unforgettable,
   unimpeachable, unspotted, unstained, unsullied, untarnished,
   upright, uprighteous, upstanding, venerable, venerated, virtuous,
   weighty, well-thought-of, winning, worshipful, worthy, yeomanly