363 entries under adjective topic. ×

5
unguarded(thoughtless, impulse, unwary)
5
unsophisticated(simple, easy, pure, impulsive)
5
untaught(simple, plain, fresh, innocent)
5
unwitting(natural, voluntary, unwilling, obligatory)
5
willed(feature, characteristic, free, regard)
5
willful(free, deliberate, natural, willing)
5
willing(free, natural, impulsive, will)
4
autonomous(feature, characteristic, free, deliberate)
4
basic(gut, intuitive)
4
deep-seated(gut, intuitive)
4
direct(honest, natural, straightforward, candid)
4
elective
4
extemporary(free, casual, impulsive, unprepared)
4
gut
4
heartfelt(gut, intuitive)
4
ill-considered(impulsive, unqualified, candid, offhand)
4
inner(gut, intuitive)
4
interior(gut, intuitive)
4
internal(gut, intuitive)
4
optional(free, deliberate, natural, willing)
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APASmart Define. (2015). spontaneous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/spontaneous/thesaurus/synonyms
ChicagoSmart Define. 2015. "spontaneous thesaurus" https://smartdefine.org/spontaneous/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, spontaneous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/spontaneous/thesaurus/synonyms>.
MLASmart Define. "spontaneous thesaurus" 3 August 2015. Web. 27 September 2026. <https://smartdefine.org/spontaneous/thesaurus/synonyms>