1. little
2. jr.
3. junior, young
4. immature, adolescent, teen, teenage, teenaged, boyish, boylike, schoolboyish, childlike, childly, early, formative, girlish, schoolgirlish, infantile, junior, little, small, newborn, puppyish, puppylike, tender, vulnerable, youngish, youthful, vernal, preteen, preadolescent, immature, junior, new, new
4. young, early