| immature(adjective, tender, pure, silly, foolish) |
| puerile(adjective, silly, foolish, trivial, green) |
| infantile(adjective, silly, innocent, inexperienced, infant) |
| silly(adjective, foolish, innocent, trivial, absurd) |
| juvenile(adjective, new, silly, trivial, inexperienced) |
| young(adjective, silly, little, inexperienced, young) |
| babyish(adjective, like, tender, silly, inexperienced) |
| fatuous |
| foolish(adjective, silly, innocent, trivial, absurd) |
| childlike(adjective, weak, tender, pure, new) |
| jejune(adjective, silly, innocent, absurd, inexperienced) |
| absurd |
| adolescent(adjective, silly, innocent, inexperienced, young) |
| boyish(adjective, infant, young, youthful) |
| frivolous(adjective, silly, trivial, immature) |
| youthful(adjective, weak, tender, new, silly) |
| simple(adjective, pure, foolish, stupid, innocent) |
| green(adjective, weak, tender, new, silly) |
| infantine(adjective, weak, tender, silly, green) |
| naive(adjective, weak, tender, pure, silly) |