- Definitions|2
- Thesaurus|1.5k
- Abbreviations|0
111 entries under adjective topic. ×
| unconscious(simple, natural, casual, impulsive) | |
| ad hoc(expression, idiom, free, unplanned) | |
| ad libitum(expression, idiom, adverb, informal) | |
| haphazard(unprepared, accidental, unintended) | |
| hasty | |
| offhanded | |
| extemporized(adverb, informal, unprepared, unplanned) | |
| improv(adverb, free, offhand, unprepared) | |
| improvise(verb, informal, unplanned, extemporize) | |
| impulsive(adverb, simple, natural, chance) | |
| abrupt | |
| automatic(free, simple, fake, natural) | |
| informal(free, casual, impulsive, spontaneous) | |
| involuntary(simple, natural, casual, impulsive) | |
| snap(free, casual, impulsive, prepared) | |
| stopgap | |
| unarranged(spontaneous, unprepared, unplanned, unrehearsed) | |
| uncontrived(simple, natural, casual, impulsive) | |
| uncontrolled(simple, natural, casual, impulsive) | |
| unexpected(chance, unqualified, vulnerable, spontaneous) |
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| APA | Smart Define. (2016). impromptu thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/impromptu/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "impromptu thesaurus" https://smartdefine.org/impromptu/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, impromptu thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/impromptu/thesaurus/synonyms>. |
| MLA | Smart Define. "impromptu thesaurus" 28 January 2016. Web. 24 September 2026. <https://smartdefine.org/impromptu/thesaurus/synonyms> |