73 entries under casual topic. ×

19
unplanned(noun, adjective, free, chance)
14
unthinking(adjective, careless, impulsive, instinctive)
13
accidental(adjective, careless, chance, planned)
13
offhand(noun, adjective, free, careless)
10
automatic(adjective, free, planned, spontaneous)
10
inadvertent(adjective, careless, thoughtless, unwise)
10
unintended(adjective, rude, careless, chance)
10
unstudied(adjective, free, spontaneous, impromptu)
9
chance(adjective, careless, random, haphazard)
8
ad lib(expression, adjective, idiom, free)
8
random(adjective, careless, chance, haphazard)
8
unconscious(adjective, careless, natural, thoughtless)
7
haphazard(adjective, organization, plan, chance)
7
improvised(adjective, free, impulsive, impulse)
7
unconsidered(noun, adjective, passionate, violent, careless)
6
fortuitous(adjective, chance, intention, random)
6
snap(noun, adjective, free, informal)
5
extemporary(adjective, free, impulsive, spontaneous)
4
incidental(adjective, careless, chance, random)
4
makeshift(adjective, free, informal, snap)
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APASmart Define. (2015). unpremeditated thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/unpremeditated/thesaurus/synonyms
ChicagoSmart Define. 2015. "unpremeditated thesaurus" https://smartdefine.org/unpremeditated/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, unpremeditated thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/unpremeditated/thesaurus/synonyms>.
MLASmart Define. "unpremeditated thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/unpremeditated/thesaurus/synonyms>