Synonyms of viability

1 Syllable
oomph, breath, heart, élan, soul, go, zing, dash, being, brio, growth, zest
2 Syllables
sparkle, vigor, esprit, verve
3 Syllables
enthusiasm, lifeblood, entity, energy, wildlife, sentience, symbiosis, impulse, essence
4 Syllables
vitality, metabolisms, liveliness, metabolism, excitement, get-up-and-go, activity, vivacity
5 Syllables
animateness, substantiality