110 entries under basic topic. ×

1
natural(material, living, functional, nuclear)
1
nitty-gritty(adjective, original, absolute, fundamental)
1
nub(adjective, original, absolute, fundamental)
1
nuclear(material, natural, living, functional)
1
paramount(important, original, serious, prime)
1
plasmic(material, natural, living, functional)
1
prefatory(simple, straightforward, uncomplicated)
1
preliminary(simple, straightforward, uncomplicated)
1
primo(simple, straightforward, uncomplicated)
1
requisite(important, original, essential, vital)
1
root(noun, adjective, original, fundamental)
1
significant(important, original, vital, primary)
1
simplest(simple, straightforward, fundamental, uncomplicated)
1
simplex(simple, straightforward, uncomplicated)
1
simplified(simple, straightforward, uncomplicated)
1
structural(material, important, natural, original)
1
substrative(important, original, vital, primary)
1
supporting(important, original, vital, primary)
1
sustaining(important, original, vital, primary)
1
theoretical(important, original, vital, primary)
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APASmart Define. (2015). basal thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/basal/thesaurus/synonyms
ChicagoSmart Define. 2015. "basal thesaurus" https://smartdefine.org/basal/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, basal thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/basal/thesaurus/synonyms>.
MLASmart Define. "basal thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/basal/thesaurus/synonyms>