363 entries under adjective topic. ×

9
unmeditated(natural, thoughtless, impulse, instinctive)
9
unprepared(free, ready, impromptu, unplanned)
8
ad-lib(impulsive, willing, unprepared, impromptu)
8
intended(verb, feature, characteristic, free)
8
off the cuff(expression, idiom, free, impromptu)
8
regular(ordinary, normal, instinctive, automatic)
8
unlearned(natural, instinctive, untrained, automatic)
7
ad lib(expression, idiom, free, unrehearsed)
7
rash(noun, thoughtless, impulsive, unthinking)
7
uncompelled(free, deliberate, natural, impulsive)
7
unsolicited(for, uninvited, unsought)
7
visceral(natural, emotional, instinctive, automatic)
6
intentional(feature, characteristic, free, regard)
6
abrupt(thoughtless, impulsive, rash, unthinking)
6
accustomed(ordinary, normal, instinctive, automatic)
6
congenital(reasonable, ordinary, instinctive, automatic)
6
easy(simple, plain, relaxed, casual)
6
hasty(thoughtless, impulsive, rash, unthinking)
6
inborn(reasonable, ordinary, instinctive, automatic)
6
ingrained(natural, instinctive, automatic, involuntary)
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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>