| passionate(careless, thoughtless, impulsive, reckless, hasty) | |
| precipitant(adjective, careless, quick, thoughtless, impulsive) | |
| precipitous(impulsive, reckless, early, hasty) | |
| precociousness | |
| precocity | |
| predeveloped(adjective, earlier) | |
| preemie | |
| prevenient | |
| prior | |
| reckless(careless, thoughtless, impulsive, hasty) | |
| rudimentary | |
| rushed | |
| sophomoric(inexperienced, young, childish, undeveloped, unformed) | |
| tardy | |
| tender(inexperienced, young, childish, undeveloped, unformed) | |
| tenderfoot(inexperienced, young, childish, undeveloped, unformed) | |
| thoughtless(careless, impulsive, reckless, hasty) | |
| timely | |
| too late | |
| unanticipated(adjective, earlier) |
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| APA | Smart Define. (2015). premature thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/premature/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "premature thesaurus" https://smartdefine.org/premature/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, premature thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/premature/thesaurus/synonyms>. |
| MLA | Smart Define. "premature thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/premature/thesaurus/synonyms> |