44 entries under expression topic. ×

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ad libitum(informal, off-the-cuff)
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as one thinks best(idiom, informal, off-the-cuff)
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as one wishes(idiom, informal, off-the-cuff)
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at will(informal, off-the-cuff)
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by chance(chance, unpremeditated)
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caught off guard(idiom, unqualified, unsuspecting, unready)
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dashed off(unprepared, unrehearsed)
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going off deep end(idiom, impulsive, rash, unthinking)
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happening unexpectedly(unintentional, unintended)
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not deliberate
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not intentional
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not planned(adjective, accidental, unintended, inadvertent)
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not predicted(adverb, unanticipated)
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not premeditated
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not prepared(unqualified, unsuspecting, unready)
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not ready(unqualified, unsuspecting, unready)
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off your own bat(idiom, willing, spontaneous, unforced)
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shot from the hip(idiom, unprepared, unrehearsed)
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taken off guard(idiom, unqualified, unsuspecting, unready)
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thrown off(unprepared, unrehearsed)
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APASmart Define. (2015). unplanned thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unplanned/thesaurus/synonyms
ChicagoSmart Define. 2015. "unplanned thesaurus" https://smartdefine.org/unplanned/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unplanned thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unplanned/thesaurus/synonyms>.
MLASmart Define. "unplanned thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/unplanned/thesaurus/synonyms>