68 entries under simple topic. ×

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animal(basic, living, unsophisticated, biological)
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immature(basic, elementary)
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larval(basic, elementary)
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old(adjective, rough, original, basic)
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straightforward(basic, uncomplicated)
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uncompleted(basic, elementary)
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underivative(basic, first, unsophisticated, previous)
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undeveloped(basic, unsophisticated, elementary)
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APASmart Define. (2016). fundamental thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/fundamental/thesaurus/synonyms
ChicagoSmart Define. 2016. "fundamental thesaurus" https://smartdefine.org/fundamental/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, fundamental thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/fundamental/thesaurus/synonyms>.
MLASmart Define. "fundamental thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/fundamental/thesaurus/synonyms>