| jejune(inexperienced, young, childish, undeveloped, unformed) |
| adolescent(inexperienced, young, childish, undeveloped, unformed) |
| baby(inexperienced, young, childish, undeveloped, unformed) |
| babyish(inexperienced, young, childish, undeveloped, unformed) |
| callow(inexperienced, young, childish, undeveloped, unformed) |
| childish(inexperienced, young, undeveloped, unformed) |
| crude(inexperienced, young, childish, undeveloped, unformed) |
| green(inexperienced, young, childish, undeveloped, unformed) |
| half-grown(inexperienced, young, childish, undeveloped, unformed) |
| half-pint |
| immature(adjective, inexperienced, young, undeveloped, unformed) |
| imperfect(inexperienced, young, childish, undeveloped, unformed) |
| inexperienced(young, childish, undeveloped, unformed, kidder) |
| infantile(inexperienced, young, childish, undeveloped, unformed) |
| infantine(inexperienced, young, childish, undeveloped, unformed) |
| juvenile(inexperienced, young, childish, undeveloped, unformed) |
| kid(inexperienced, young, childish, undeveloped, unformed) |
| kidstuff(inexperienced, young, childish, undeveloped, unformed) |
| mite |
| peewee |