52 entries under unplanned topic. ×

24
impulsive(noun, adjective, moving, simple, easy)
16
extemporaneous(noun, adjective, plain, impulsive, willing)
10
extempore(adjective, free, simple, fake, informal)
10
spur-of-the-moment(noun, adjective, free, fake, informal)
9
casual(adjective, calm, free, fake, plain)
9
unprepared(adjective, free, ready, impromptu)
8
ad-lib(adjective, impulsive, willing, unprepared, impromptu)
6
unintentional(adjective, natural, chance, routine, impulsive)
4
unintended(chance, unwilling, obligatory, accidental)
4
unscripted(adjective, unprepared, impromptu, unrehearsed)
3
off-the-cuff(adjective, simple, informal, natural, straightforward)
2
improv(adjective, free, simple, fake, informal)
2
improvise(informal, impulse, extemporize, off-the-cuff)
2
improviso(free, informal, casual, unprepared)
2
random(careless, chance, casual, arbitrary)
1
accidental(adjective, careless, chance, casual, erratic)
1
ad hoc(expression, free, casual, unrehearsed)
1
ad libitum(expression, informal, extemporize, off-the-cuff)
1
autoschediastic(free, casual, impulsive, unprepared, impromptu)
1
chance(careless, casual, arbitrary, accidental)
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APASmart Define. (2015). spontaneous thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/spontaneous/thesaurus/synonyms
ChicagoSmart Define. 2015. "spontaneous thesaurus" https://smartdefine.org/spontaneous/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, spontaneous thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/spontaneous/thesaurus/synonyms>.
MLASmart Define. "spontaneous thesaurus" 3 August 2015. Web. 28 September 2026. <https://smartdefine.org/spontaneous/thesaurus/synonyms>