| trivial | |
| underdeveloped(inexperienced, young, childish, undeveloped, unformed) | |
| undergrown(inexperienced, young, childish, undeveloped, unformed) | |
| unfinished(inexperienced, young, childish, undeveloped, unformed) | |
| unformed(inexperienced, young, childish, undeveloped) | |
| unseasonable(inexperienced, young, childish, undeveloped, unformed) | |
| unseasoned(inexperienced, young, childish, undeveloped, unformed) | |
| unsophisticated(adjective, innocent, inexperienced, young, childlike) | |
| untimely(inexperienced, young, childish, undeveloped, unformed) | |
| weak | |
| wet behind ears(expression, inexperienced, young, childish, undeveloped) | |
| asinine | |
| babyhood | |
| beardless | |
| cherubic(adjective, youth) | |
| child | |
| child-like | |
| childhood | |
| childishly immature | |
| children |
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Infantile on
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| APA | Smart Define. (2015). infantile thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/infantile/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "infantile thesaurus" https://smartdefine.org/infantile/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, infantile thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/infantile/thesaurus/synonyms>. |
| MLA | Smart Define. "infantile thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/infantile/thesaurus/synonyms> |