79 entries under natural topic. ×

9
impetuous(noun, adjective, moving, passionate, violent)
9
reflex(adjective, routine, impulsive, planned)
9
unbidden(adjective, free, deliberate, impulsive)
9
casual(adjective, calm, free, fake, plain)
9
intuitive(adjective, reasonable, instinctive, automatic)
9
normal(adjective, ordinary, instinctive, automatic)
9
unmeditated(adjective, thoughtless, impulse, instinctive)
8
intended(verb, adjective, feature, characteristic, free)
8
unlearned(adjective, instinctive, untrained, automatic)
7
uncompelled(adjective, free, deliberate, impulsive)
7
visceral(adjective, emotional, instinctive, automatic)
6
intentional(adjective, feature, characteristic, free, regard)
6
candid(simple, easy, honest, plain, pure)
6
ingrained(adjective, instinctive, automatic, involuntary)
6
intrinsic(adjective, instinctive, automatic, involuntary)
6
intuitional(adjective, instinctive, automatic, involuntary)
6
rooted(adjective, instinctive, automatic, involuntary)
6
unintentional(adjective, chance, routine, impulsive)
6
volitional(adjective, feature, characteristic, free, regard)
6
volunteer(adjective, feature, characteristic, free, regard)
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APASmart Define. (2015). spontaneous thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/spontaneous/thesaurus/synonyms
ChicagoSmart Define. 2015. "spontaneous thesaurus" https://smartdefine.org/spontaneous/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, spontaneous thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/spontaneous/thesaurus/synonyms>.
MLASmart Define. "spontaneous thesaurus" 3 August 2015. Web. 29 September 2026. <https://smartdefine.org/spontaneous/thesaurus/synonyms>