The Collaborative International Dictionary of English v.0.48:

Resplendence \Re*splen"dence\ (r?*spl?n"dens), Resplendency
\Re*splen"den*cy\ (-den*s?), n. [L. resplendentia.]
   The quality or state of being resplendent; brilliant luster;
   vivid brightness; splendor.
   [1913 Webster]

         Son! thou in whom my glory I behold
         In full resplendence, heir of all my might. --Milton.
   [1913 Webster]

         The resplendency of his own almighty goodness. --Dr. J.
                                                  Scott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

resplendence
    n 1: brilliant radiant beauty; "the glory of the sunrise" [syn:
         glory, resplendence, resplendency]

Moby Thesaurus II by Grady Ward, 1.0:

69 Moby Thesaurus words for "resplendence":
   Babylonian splendor, aura, blare, blaze, blaze of glory,
   blazing light, blinding light, bright light, brightness,
   brilliance, brilliancy, brilliant light, burst of light, charisma,
   dazzling light, effulgence, elaborateness, elegance, envelope,
   flamboyance, flood of light, fulgor, glamour, glare, glaring light,
   gloriousness, glory, gorgeousness, grandeur, grandiosity,
   grandness, halo, heavenliness, illustriousness, imposingness,
   impressiveness, lavishness, luster, luxuriousness, luxury, magic,
   magnificence, majesty, mystique, nimbus, nobility, numinousness,
   plushness, poshness, proudness, radiance, radiancy,
   radiant splendor, ravishingness, refulgence, refulgency,
   resplendency, ritziness, splendidness, splendiferousness, splendor,
   splendorousness, splendrousness, state, stateliness,
   streaming light, sublimity, sumptuousness, vividness