vigor

Synonyms: ability action activity agility alertness bang birr bounce capability capacity dash drive dynamism endurance enterprise exercise fire force get-up-and-go go hardiness healthiness intensity juice kick liveliness lustiness might motion moxie muscle nimbleness pep pith potency puissance punch push quickness snap sock soundness starch steam strength tuck urgency vehemence vim vitality well-being zing zip

Antonyms: enervation idleness inactivity lethargy weakness