| insuppressible(careless, thoughtless, impulsive, reckless, hasty) | |
| intempestive | |
| intrusive | |
| irrational(careless, thoughtless, impulsive, reckless, hasty) | |
| irrelevant | |
| jumping to conclusions(expression, idiom, careless, thoughtless, impulsive) | |
| kid(inexperienced, young, childish, undeveloped, unformed) | |
| kidstuff(inexperienced, young, childish, undeveloped, unformed) | |
| madcap(careless, thoughtless, impulsive, reckless, hasty) | |
| mal a propos(expression, idiom) | |
| malapropos | |
| morning | |
| new | |
| not firm | |
| obsolete | |
| off base | |
| out of line(expression, idiom) | |
| out of phase(expression, idiom) | |
| out of time(expression, idiom) | |
| overearly(adjective, quick, improper, inappropriate, unfortunate) |
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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> |