Synonyms|285Antonyms|76|Broader|4Narrower|0Related|306

49 entries under fundamental topic. ×

2
bottom-line(adjective, important, significant, original, essential)
2
chief(adjective, important, significant, serious, capital)
2
elemental(adjective, important, significant, original, essential)
2
elementary(adjective, characteristic, important, significant, natural)
2
intrinsic(adjective, characteristic, important, significant, natural)
2
significant(adjective, important, original, serious, essential)
2
wanted(adjective, important, significant, serious, capital)
1
bottom(adjective, important, significant, original, essential)
1
coal-and-ice(important, essential, critical, basic)
1
decisive(adjective, important, significant, essential, critical)
1
heavy(important, essential, critical, earnest)
1
latent(adjective, characteristic, natural, original, essential)
1
meaningful(important, substantial, serious, essential, critical)
1
name(important, essential, critical, imperative)
1
name-of-the-game(important, essential, critical, basic)
1
nitty-gritty(adjective, important, original, essential, critical)
1
original(characteristic, important, significant, essential, basic)
1
prime(adjective, important, significant, original, serious)
1
primitive(adjective, important, significant, original, essential)
1
radical(adjective, important, significant, original, essential)
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APASmart Define. (2015). indispensable thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/indispensable/thesaurus/synonyms
ChicagoSmart Define. 2015. "indispensable thesaurus" https://smartdefine.org/indispensable/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, indispensable thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/indispensable/thesaurus/synonyms>.
MLASmart Define. "indispensable thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/indispensable/thesaurus/synonyms>