noun (n)

• enduring strength and energy(noun.attribute)

  Synonym:
  staying power, toughness
  

  source: wordnet30
• See Stamen.(noun)

  source: webster1913
• The fixed, firm part of a body, which supports it or gives it strength and solidity; as, the bones are the stamina of animal bodies; the ligneous parts of trees are the stamina which constitute their strength.(noun)

  source: webster1913