Synonyms for Lustiness:

n.

health (noun)
hardiness, strength, vigor, robustness, energy.
lustiness (noun)
robustness, hardiness.
might (noun)
puissance, potency.
sensuality (noun)
passion.
stamina (noun)
vim, power.
vigor (noun)
friskiness, passion, exuberance, potency, enthusiasm, agitation, excitement, zeal, agility, zest, energy, liveliness, sprightliness, Ardency, earnestness, power, fervency, relish, activity, spirit, animation, industriousness, puissance, eagerness, vim, strength, vigor, gusto, verve.
vitality (noun)
zest, animation, exuberance, verve.

Other synonyms:

Other relevant words:
robustness, hardiness.