52 entries under unplanned topic. ×
| impulsive(noun, adjective, moving, simple, easy) | |
| extemporaneous(noun, adjective, plain, impulsive, willing) | |
| extempore(adjective, free, simple, fake, informal) | |
| spur-of-the-moment(noun, adjective, free, fake, informal) | |
| casual(adjective, calm, free, fake, plain) | |
| unprepared(adjective, free, ready, impromptu) | |
| ad-lib(adjective, impulsive, willing, unprepared, impromptu) | |
| unintentional(adjective, natural, chance, routine, impulsive) | |
| unintended(chance, unwilling, obligatory, accidental) | |
| unscripted(adjective, unprepared, impromptu, unrehearsed) | |
| off-the-cuff(adjective, simple, informal, natural, straightforward) | |
| improv(adjective, free, simple, fake, informal) | |
| improvise(informal, impulse, extemporize, off-the-cuff) | |
| improviso(free, informal, casual, unprepared) | |
| random(careless, chance, casual, arbitrary) | |
| accidental(adjective, careless, chance, casual, erratic) | |
| ad hoc(expression, free, casual, unrehearsed) | |
| ad libitum(expression, informal, extemporize, off-the-cuff) | |
| autoschediastic(free, casual, impulsive, unprepared, impromptu) | |
| chance(careless, casual, arbitrary, accidental) |
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| APA | Smart Define. (2015). spontaneous thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/spontaneous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "spontaneous thesaurus" https://smartdefine.org/spontaneous/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, spontaneous thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/spontaneous/thesaurus/synonyms>. |
| MLA | Smart Define. "spontaneous thesaurus" 3 August 2015. Web. 28 September 2026. <https://smartdefine.org/spontaneous/thesaurus/synonyms> |