90 entries under original topic. ×

1
grass-roots(important, significant, basic, vital)
1
head(adjective, beginning, opening, prime)
1
headmost(adjective, head, beginning, fresh)
1
latent(adjective, characteristic, natural, essential)
1
least(adjective, head, beginning, opening)
1
meat-and-potatoes(important, significant, basic, vital)
1
needful(adjective, significant, essential, basic)
1
nitty-gritty(adjective, basic, absolute, fundamental)
1
nub(adjective, basic, absolute, fundamental)
1
paramount(adjective, important, significant, essential)
1
pioneer(adjective, head, beginning, prime)
1
premier(adjective, head, beginning, fresh)
1
primo(adjective, simple, straightforward, basic)
1
requisite(adjective, important, significant, essential)
1
root(adjective, basic, fundamental, primary)
1
significant(adjective, important, essential, basic)
1
slightest(adjective, head, beginning, opening)
1
smallest(adjective, head, beginning, opening)
1
structural(important, significant, basic, vital)
1
substrative(important, significant, basic, vital)
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APASmart Define. (2015). elementary thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/elementary/thesaurus/synonyms
ChicagoSmart Define. 2015. "elementary thesaurus" https://smartdefine.org/elementary/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, elementary thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/elementary/thesaurus/synonyms>.
MLASmart Define. "elementary thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/elementary/thesaurus/synonyms>