58 entries under basic topic. ×

1
essential(noun, adjective, important, significant, original)
1
first(important, significant, original, vital)
1
grass-roots(important, significant, original, vital)
1
indispensable(adjective, important, significant, original, essential)
1
integral(important, significant, original, vital)
1
intrinsic(adjective, important, significant, original, essential)
1
key(important, significant, original, vital)
1
major(important, significant, original, vital)
1
meat-and-potatoes(adjective, important, significant, original)
1
necessary(adjective, important, significant, original, essential)
1
nitty-gritty(noun, adjective, quality, character, strength)
1
original(important, significant, vital, fundamental)
1
paramount(important, significant, original, vital)
1
prime(verb, adjective, support, base, important)
1
primitive(adjective, important, significant, original, essential)
1
primordial(adjective, important, significant, original)
1
principal(important, significant, original, vital)
1
requisite(important, significant, original, vital)
1
rudimentary(adjective, important, significant, original)
1
significant(important, original, vital, major)
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APASmart Define. (2016). bottom thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/bottom/thesaurus/synonyms
ChicagoSmart Define. 2016. "bottom thesaurus" https://smartdefine.org/bottom/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, bottom thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/bottom/thesaurus/synonyms>.
MLASmart Define. "bottom thesaurus" 2 March 2016. Web. 20 September 2026. <https://smartdefine.org/bottom/thesaurus/synonyms>