noun (n)

• any of the various theories or doctrines or philosophical systems that attempt to explain the phenomena of the universe in terms of some immanent force or energy(noun.cognition)

  source: wordnet30
• active strength of body or mind(noun.attribute)

  Synonym:
  heartiness, vigor, vigour
  

  source: wordnet30
• the activeness of an energetic personality(noun.attribute)

  Synonym:
  oomph, pizzaz, pizzazz, zing
  

  source: wordnet30
• The doctrine of Leibnitz, that all substance involves force.(noun)

  source: webster1913