What is another word for "vigor"?

Roget's Thesaurus (1911) lists these synonyms for "vigor": air, and, antithesis, antithetical, bell, better, bill, bloom, bobbish, body, bold, boldness, brave, breath, buck, burn, can, case, clean, command, cure, daisy, elevated, elevation, eloquence, eloquent, enjoy, est, eupepsia, excellent, feather, fine, fire, florid, flourish, flush, force, forcible, fresh, full.