- Definitions|2
- Thesaurus|1k
- Abbreviations|0
65 entries under unplanned topic. ×
| impromptu(adjective, adverb, simple, plain, informal) | |
| spontaneous(noun, adjective, plain, impulsive, willing) | |
| unrehearsed(adjective, adverb, plain, impulsive, prepared) | |
| offhand(noun, adjective, simple, natural, chance) | |
| unpremeditated(noun, adjective, impulsive, planned, impulse) | |
| unprepared(adjective, spontaneous, unprepared, impromptu) | |
| extempore(adjective, simple, informal, natural, chance) | |
| improvised(adjective, simple, informal, natural, chance) | |
| spur-of-the-moment(noun, adjective, impulsive, prepared, spontaneous) | |
| ad-lib(adjective, simple, informal, natural, casual) | |
| impulsive(noun, adjective, adverb, simple, natural) | |
| off-the-cuff(adjective, adverb, simple, informal, natural) | |
| unstudied(adjective, simple, natural, casual, impulsive) | |
| casual(adjective, free, simple, natural, chance) | |
| haphazard(adjective, unprepared, accidental, inadvertent) | |
| undevised(adjective, unprepared, unintentional, accidental) | |
| ad libitum(expression, adjective, idiom, adverb, informal) | |
| improviso(adjective, free, casual, spontaneous, unprepared) | |
| improvise(informal, impulse, extemporize, off-the-cuff) | |
| involuntary(noun, adjective, simple, passionate, violent) |
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| APA | Smart Define. (2015). extemporaneous thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/extemporaneous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "extemporaneous thesaurus" https://smartdefine.org/extemporaneous/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, extemporaneous thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/extemporaneous/thesaurus/synonyms>. |
| MLA | Smart Define. "extemporaneous thesaurus" 13 April 2015. Web. 30 September 2026. <https://smartdefine.org/extemporaneous/thesaurus/synonyms> |