28 entries under unplanned topic. ×

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impromptu(chance, unpremeditated)
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improvised(chance, unpremeditated)
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impulsive(chance, unpremeditated)
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infrequent(chance, unpremeditated)
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irregular(chance, unpremeditated)
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off-the-cuff(chance, unpremeditated)
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offhand(chance, unpremeditated)
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spontaneous(chance, unpremeditated)
<12>
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APASmart Define. (2015). serendipitous thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/serendipitous/thesaurus/synonyms
ChicagoSmart Define. 2015. "serendipitous thesaurus" https://smartdefine.org/serendipitous/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, serendipitous thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/serendipitous/thesaurus/synonyms>.
MLASmart Define. "serendipitous thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/serendipitous/thesaurus/synonyms>