Synonyms|256Antonyms|65|Broader|1Narrower|0Related|245

66 entries under essential topic. ×

23
fundamental(adjective, simple, plain, important, straightforward)
22
basic(adjective, simple, plain, base, important)
15
primary(adjective, simple, plain, base, important)
15
elementary(adjective, simple, plain, important, significant)
13
elemental(adjective, simple, plain, important, significant)
11
cardinal(noun, adjective, important, significant, original)
9
radical(adjective, base, important, significant, last)
9
rudimentary(adjective, simple, plain, important, significant)
9
inherent(adjective, basic, absolute, fundamental)
8
basal(adjective, simple, plain, base, important)
8
intrinsic(adjective, important, significant, original)
8
primitive(adjective, simple, plain, important, significant)
7
bottom(noun, adjective, important, significant, original)
7
prime(adjective, important, significant, original)
7
principal(adjective, important, significant, original)
6
crucial(adjective, important, significant, original)
6
foundational(adjective, simple, plain, base, important)
6
vital(adjective, top, important, significant, original)
5
critical(adjective, original, fundamental, key)
5
original(adjective, simple, plain, important, significant)
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APASmart Define. (2015). underlying thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/underlying/thesaurus/synonyms
ChicagoSmart Define. 2015. "underlying thesaurus" https://smartdefine.org/underlying/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, underlying thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/underlying/thesaurus/synonyms>.
MLASmart Define. "underlying thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/underlying/thesaurus/synonyms>