SYNONYMS
robustness, healthiness, good health, hardiness, strength, stamina, sturdiness, fitness, good shape, good trim, good condition, fine fettle, toughness, ruggedness, muscle, power
bloom, radiance, sap
energy, activity, liveliness, life, spryness, sprightliness, vitality, vivacity, vivaciousness, verve, animation, spiritedness, spirit, enthusiasm, fire, fieriness, fervour, ardour, zeal, passion, might, forcefulness, determination, intensity, dynamism, sparkle, effervescence, zest, dash, snap, spark, gusto, pep, bounce, exuberance, drive, push, elan
informal zip, zing, oomph, vim, go, get-up-and-go, punch
British informal welly
literary thew, thewiness