What is another word for "juvenescence"?

Roget's Thesaurus (1911) lists these synonyms for "juvenescence": age, and, babyhood, beardless, bloom, boyhood, budding, callow, childhood, cradle, flower, generation, girlhood, glad, golden, green, helm, heyday, infancy, junior, juniority, juvenile, juvenility, leading, life, minority, nonage, nursery, pleasure, prime, prow, puberty, pucelage, puisne, pupilage, rising, sappy, school, season, seedtime.