[1] : The Collaborative International Dictionary of English v.0.48

grandeur \gran"deur\, n. f., fr. grand. see grand.
   the state or quality of being grand; vastness; greatness;
   splendor; magnificence; stateliness; sublimity; dignity;
   elevation of thought or expression; nobility of action.
   1913 webster

         nor doth this grandeur and majestic show
         of luxury . . . allure mine eye.         --milton.

   syn: sublimity; majesty; stateliness; augustness; loftiness.
        see sublimity.
        1913 webster
see also:
grand sublimity 

[2] : WordNet (r) 2.0

grandeur
     n 1: the quality of being magnificent or splendid or grand syn:
          magnificence, brilliance, splendor, splendour, grandness
     2: the quality of being exalted in character or ideals or
        conduct syn: nobility, magnanimousness
see also:
magnificence brilliance splendor splendour grandness nobility 
magnanimousness 

[3] : Moby Thesaurus II by Grady Ward, 1.0

102 moby thesaurus words for "grandeur":
   babylonian splendor, ampleness, amplitude, augustness, bigness,
   broadness, bulk, capaciousness, comprehensiveness, consequence,
   conspicuousness, copiousness, courtliness, dignifiedness, dignity,
   distinction, elaborateness, elegance, elevation, eminence,
   enormity, enormousness, exaltation, excellence, expanse,
   expansiveness, extensiveness, formidableness, fullness,
   generousness, gigantism, glory, gorgeousness, grandiosity,
   grandness, gravity, great scope, greatness, high mightiness,
   hugeness, immensity, importance, imposingness, impressiveness,
   infinity, intensity, kingliness, largeness, lavishness, loftiness,
   lordliness, luxuriousness, luxury, magnificence, magnitude,
   majesty, mark, might, mightiness, muchness, nobility, nobleness,
   notability, note, outstandingness, plenitude, plushness, pomp,
   poshness, power, pride of bearing, pride of place, princeliness,
   prodigiousness, profundity, prominence, proud bearing, proudness,
   regality, resplendence, ritziness, sedateness, significance,
   sobriety, solemnity, spaciousness, splendidness, splendiferousness,
   splendor, state, stateliness, strength, stupendousness, sublimity,
   sumptuousness, supereminence, tallness, tremendousness, vastness,
   venerability, wideness, worthiness

Grandeur >> G Words
Grandeur, definition of term: Grandeur
grandeur_pag1.html