43 entries under natural topic. ×

7
reflex(adjective, inside, interior, automatic)
6
automatic(adjective, inside, interior, within)
6
impulsive(adjective, instinctive, automatic, involuntary)
6
instinctive(adjective, characteristic, essential, automatic)
6
involuntary(adjective, instinctive, automatic, reflex)
6
mechanical(adjective, instinctive, automatic, inherent)
6
regular(adjective, characteristic, instinctive, automatic)
6
spontaneous(adjective, instinctive, automatic, involuntary)
6
typical(adjective, special, instinctive, automatic)
6
unlearned(adjective, instinctive, automatic, inherent)
6
unmeditated(adjective, instinctive, automatic, involuntary)
6
unpremeditated(adjective, instinctive, automatic, involuntary)
6
unprompted(adjective, instinctive, automatic, inherent)
6
unthinking(adjective, instinctive, automatic, inherent)
5
connate(adjective, characteristic, essential, basic)
5
individual(adjective, characteristic, exact, certain)
4
elementary(adjective, characteristic, important, significant)
2
indispensable(adjective, characteristic, important, significant)
2
resident(adjective, characteristic, individual, essential)
1
endemic(adjective, true, special, individual)
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APASmart Define. (2016). intrinsic thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/intrinsic/thesaurus/synonyms
ChicagoSmart Define. 2016. "intrinsic thesaurus" https://smartdefine.org/intrinsic/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, intrinsic thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/intrinsic/thesaurus/synonyms>.
MLASmart Define. "intrinsic thesaurus" 31 March 2016. Web. 1 October 2026. <https://smartdefine.org/intrinsic/thesaurus/synonyms>