Synonyms|431Antonyms|101|Broader|1Narrower|0Related|240

167 entries under adjective topic. ×

3
serendipitous(chance, unplanned)
3
sudden(noun, passionate, violent, careless)
3
unarranged(spontaneous, unprepared, unplanned, unrehearsed)
3
undevised(unplanned, unintentional, accidental, inadvertent)
3
unexpected(passionate, violent, careless, casual)
3
unmeant(rude, careless, casual, thoughtless)
3
unorganized(careless, casual, arbitrary)
3
unpredictable(noun, passionate, violent, thoughtless)
3
visceral(natural, instinctive, automatic, involuntary)
2
ad hoc(expression, free, casual, unrehearsed)
2
adventitious(chance, haphazard, unplanned, accidental)
2
arbitrary(careless, chance, casual, random)
2
blundering(rude, careless, thoughtless, unwise)
2
careless(passionate, violent, casual, thoughtless)
2
improviso(free, casual, spontaneous, unprepared)
2
informal(free, casual, snap, spontaneous)
2
instantaneous
2
last-minute
2
made-up(free, informal, casual, snap)
2
off-the-cuff(chance, spontaneous, unprepared, impromptu)
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APASmart Define. (2015). unpremeditated thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unpremeditated/thesaurus/synonyms
ChicagoSmart Define. 2015. "unpremeditated thesaurus" https://smartdefine.org/unpremeditated/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unpremeditated thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unpremeditated/thesaurus/synonyms>.
MLASmart Define. "unpremeditated thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/unpremeditated/thesaurus/synonyms>