decadence

decadence
    n 1: the state of being degenerate in mental or moral qualities
         [syn: {degeneracy}, {degeneration}, {decadence},
         {decadency}]
    

Decadence \De*ca"dence\, Decadency \De*ca"den*cy\, n. [LL.
   decadentia; L. de- + cadere to fall: cf. F. d['e]cadence. See
   {Decay}.]
   A falling away; decay; deterioration; declension. "The old
   castle, where the family lived in their decadence." --Sir W.
   Scott.
   [1913 Webster]
    

65 Moby Thesaurus words for "decadence":
      abandon, abandonment, abjection, comedown, corruptedness,
      corruption, corruptness, debasement, decadency, decadent, decayed,
      declension, declination, decline, deformation, degeneracy,
      degenerate, degenerateness, degeneration, degradation,
      demoralization, demotion, depravation, depravedness, depravity,
      depreciation, derogation, descent, deterioration, devolution,
      dissoluteness, downfall, downgrade, downtrend, downturn,
      downward mobility, downward trend, drop, dying, ebb, effeteness,
      fading, failing, failure, failure of nerve, fall, falling-off,
      involution, lapse, loss of tone, moral pollution, moral turpitude,
      overripe, profligacy, regress, regression, reprobacy, retrocession,
      retrogradation, retrogression, rottenness, slippage, slump,
      turpitude, wane