12 entries under immature topic. ×
| green(adjective, healthy, experienced) | |
| young(adjective, old) | |
| childish(adjective, silly) | |
| youthful(adjective, new, old) | |
| unripe(noun, adjective, reading) | |
| undeveloped | |
| inexperienced(adjective, old, seasoned) | |
| callow | |
| unprepared | |
| unready | |
| ignorant | |
| unsuitable |
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| APA | Smart Define. (2015). mature thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/mature/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "mature thesaurus" https://smartdefine.org/mature/thesaurus/antonyms (accessed October 1, 2026). |
| Harvard | Smart Define 2015, mature thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/mature/thesaurus/antonyms>. |
| MLA | Smart Define. "mature thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/mature/thesaurus/antonyms> |