The Collaborative International Dictionary of English v.0.48:

Declamatory \De*clam"a*to*ry\, a. [L. declamatorius: cf. F.
   d['e]clamatoire.]
   1. Pertaining to declamation; treated in the manner of a
      rhetorician; as, a declamatory theme.
      [1913 Webster]

   2. Characterized by rhetorical display; pretentiously
      rhetorical; without solid sense or argument; bombastic;
      noisy; as, a declamatory way or style.
      [1913 Webster]

WordNet (r) 3.0 (2006):

declamatory
    adj 1: ostentatiously lofty in style; "a man given to large
           talk"; "tumid political prose" [syn: bombastic,
           declamatory, large, orotund, tumid, turgid]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "declamatory":
   Gongoresque, Johnsonian, affected, aureate, bedizened,
   big-sounding, bombastic, convoluted, elevated, elocutionary,
   eloquent, euphuistic, flamboyant, flaming, flashy, flaunting,
   flowery, forensic, fulsome, garish, gaudy, grandiloquent,
   grandiose, grandisonant, high-flowing, high-flown, high-flying,
   high-sounding, highfalutin, inkhorn, labyrinthine, lexiphanic,
   lofty, lurid, magniloquent, meretricious, oratorical, orotund,
   ostentatious, overdone, overelaborate, overinvolved, overwrought,
   pedantic, pompous, pretentious, rhetorical, sensational,
   sensationalistic, sententious, showy, sonorous, stilted, tall,
   tortuous