139 entries under original topic. ×

1
chief(top, essential, fundamental, key)
1
congenital(adjective, basic, absolute, fundamental)
1
crumbling(last, past, venerable, outdated)
1
decayed(last, past, venerable, outdated)
1
deep-seated(adjective, essential, basic, absolute)
1
done(last, past, venerable, outdated)
1
front(adjective, head, beginning, opening)
1
grass-roots(adjective, important, significant, essential)
1
hackneyed(last, past, venerable, outdated)
1
head(adjective, beginning, opening, prime)
1
headmost(adjective, head, beginning, opening)
1
inborn(adjective, basic, absolute, fundamental)
1
inbred(adjective, basic, absolute, fundamental)
1
indispensable(adjective, important, significant, essential)
1
innate(adjective, body, material, natural, animate)
1
integral(adjective, body, material, important, significant)
1
leading(adjective, top, head, beginning)
1
least(adjective, head, beginning, opening)
1
main(adjective, top, essential, basic)
1
major(adjective, important, significant, essential)
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APASmart Define. (2015). primitive thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/primitive/thesaurus/synonyms
ChicagoSmart Define. 2015. "primitive thesaurus" https://smartdefine.org/primitive/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, primitive thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/primitive/thesaurus/synonyms>.
MLASmart Define. "primitive thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/primitive/thesaurus/synonyms>