Synonyms|174Antonyms|2|Broader|0Narrower|0Related|13
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forced(unwilling, obligatory, compulsory)
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grudging(unwilling, obligatory, compulsory)
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heartfelt
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impetuous
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impromptu
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in-built(spontaneous, instinctive)
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instincts
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lifelike
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mammalian(adjective, physical, bodily, visceral)
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mechanic
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muscular(adjective, physical, bodily, visceral)
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obligatory(unwilling, compulsory)
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offhand
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perfunctory(unconscious, involuntary)
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primeval(primitive, intuitive)
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primitive
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random
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reflexive(unwilling, obligatory, compulsory)
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reluctant(unwilling, obligatory, compulsory)
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robot-like
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APASmart Define. (2015). instinctual thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/instinctual/thesaurus/synonyms
ChicagoSmart Define. 2015. "instinctual thesaurus" https://smartdefine.org/instinctual/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, instinctual thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/instinctual/thesaurus/synonyms>.
MLASmart Define. "instinctual thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/instinctual/thesaurus/synonyms>