The Collaborative International Dictionary of English v.0.48:

Noisy \Nois"y\, a. [Compar. Noisier; superl. Noisiest.]
   [From Noise.]
   1. Making a noise, esp. a loud sound; clamorous; vociferous;
      turbulent; boisterous; as, the noisy crowd.
      [1913 Webster]

   2. Full of noise. "The noisy town." --Dryden.
      [1913 Webster]

WordNet (r) 3.0 (2006):

noisy
    adj 1: full of or characterized by loud and nonmusical sounds;
           "a noisy cafeteria"; "a small noisy dog" [ant: quiet]
    2: attracting attention by showiness or bright colors; "a noisy
       sweater"

Moby Thesaurus II by Grady Ward, 1.0:

73 Moby Thesaurus words for "noisy":
   bawling, blaring, blasting, blatant, blatting, blustering,
   blusterous, blustery, boanergean, boisterous, brassy, brawling,
   brazen, bullying, cacophonic, cacophonous, clamant, clamorous,
   clamoursome, clanging, clangorous, clarion, clattery, crying,
   deafening, discordant, dissonant, ear-splitting, grating, harsh,
   hectoring, jarring, loud, loudmouthed, mafficking, noiseful,
   obstreperous, openmouthed, piercing, rackety, raging, ranting,
   raving, resounding, riotous, rip-roaring, roistering, roisterous,
   rollicking, rowdy, screaming, shouting, shrill, sonorous, storming,
   strepitant, strepitous, strident, swaggering, swashbuckling,
   swashing, thunderous, tumultuous, turbulent, unmusical, uproarious,
   vociferant, vociferating, vociferous, yammering, yapping, yelling,
   yelping