vitality

Synonyms: animation ardor audacity bang being bloom bounce clout continuity drive endurance existence exuberance fervor force get-up-and-go go guts intensity life liveliness lustiness pep pizzazz power pulse punch robustness snap sparkle spunk stamina starch steam strength stuff venturesomeness verve vigor vim vivaciousness vivacity zest zing zip

Antonyms: apathy lethargy