Source : Webster's Revised Unabridged Dictionary (1913)

Invigoration \In*vig`or*a"tion\, n.
   The act of invigorating, or the state of being invigorated.

Source : WordNet®

invigoration
     n 1: quality of being active or spirited or alive and vigorous
          [syn: {animation}, {spiritedness}, {brio}, {vivification}]
     2: the activity of giving vitality and vigour to something
        [syn: {vivification}, {animation}]