52 entries under unplanned topic. ×
| fluky(chance, accidental, unpremeditated) | |
| fly-by-night | |
| fortuitous(chance, accidental, unintended, unpremeditated) | |
| infrequent(chance, unpremeditated) | |
| occasional(chance, unpremeditated) | |
| odd(chance, unpremeditated) | |
| serendipitous(chance, unpremeditated) | |
| thrown off(expression, unprepared, unrehearsed) | |
| uncertain(chance, unpremeditated) | |
| unforeseen(chance, accidental, unintended, unpremeditated) | |
| vamped(unprepared, unrehearsed) | |
| without restraint(expression, informal, extemporize, off-the-cuff) |
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| APA | Smart Define. (2015). spontaneous thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/spontaneous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "spontaneous thesaurus" https://smartdefine.org/spontaneous/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, spontaneous thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/spontaneous/thesaurus/synonyms>. |
| MLA | Smart Define. "spontaneous thesaurus" 3 August 2015. Web. 30 September 2026. <https://smartdefine.org/spontaneous/thesaurus/synonyms> |