Synonyms for juvenile

modified

1. Young

   youthful, adolescent, pubescent, tender, immature, infantile, growing, undeveloped, babyish, beardless, boyish, girlish, formative, budding, unfledged, teenage, junior, younger, developing, fresh, milk-fed, blooming, unweaned, unformed, plastic, green*, sappy*, kiddish*; see also young 1.

   Antonyms old*, elder, elderly.

2. Suited to youth

   immature, callow, puerile, childish; see childish 1, naive, young 2. See syn. study at young.