4
unreflecting(adjective, spontaneous, instinctive, intuitive)
4
unstudied(adjective, simple, natural, casual, impulsive)
4
untaught(adjective, spontaneous, instinctive, intuitive)
4
viscerous(adjective, gut, intuitive)
3
autonomic
3
essential(adjective, reasonable, ordinary, usual, normal)
3
extemporaneous(noun, adjective, simple, passionate, violent)
3
gut(adjective, emotional, ignorant, hidden, unconscious)
3
imperative(adjective, required)
3
impetuous(noun, adjective, simple, passionate, violent)
3
indispensable(adjective, required)
3
mindless(adjective, unconscious)
3
offhand(noun, adjective, simple, violent, natural)
3
opposed(adjective, difficult, awkward, unenthusiastic, forced)
3
spur-of-the-moment(noun, adjective, impulsive, unprompted)
3
subliminal(ignorant, hidden, unconscious, unaware, oblivious)
3
unguarded
2
aimless(unknowing, unaware, unplanned, accidental, unsuspecting)
2
backward(adjective, difficult, awkward, unenthusiastic, forced)
2
chance(unknowing, unaware, unplanned, accidental, unsuspecting)
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APASmart Define. (2015). involuntary thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/involuntary/thesaurus/synonyms
ChicagoSmart Define. 2015. "involuntary thesaurus" https://smartdefine.org/involuntary/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, involuntary thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/involuntary/thesaurus/synonyms>.
MLASmart Define. "involuntary thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/involuntary/thesaurus/synonyms>