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

87 entries under basic topic. ×

1
primitive(adjective, important, significant, original, essential)
1
primordial(important, significant, original, vital)
1
quintessential(adjective, important, significant, essential)
1
radical(adjective, important, significant, original, essential)
1
rudimentary(important, significant, original, vital)
1
structural(important, significant, original, vital)
1
substratal(adjective, important, significant, original, essential)
1
substrative(important, significant, original, vital)
1
supporting(important, significant, original, vital)
1
sustaining(important, significant, original, vital)
1
theoretical(important, significant, original, vital)
1
underived(important, significant, original, vital)
1
underlined(important, essential, critical, fundamental)
0
bottom line(expression, important, significant, essential)
0
concealed(adjective, original, fundamental, hidden)
0
de rigueur(expression, adjective, significant, essential)
0
deep(original, primary)
0
expedient(adjective, significant, essential, vital)
0
hidden(adjective, original, fundamental, primary)
0
incumbent on(expression, adjective, significant, essential)
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APASmart Define. (2015). indispensable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/indispensable/thesaurus/synonyms
ChicagoSmart Define. 2015. "indispensable thesaurus" https://smartdefine.org/indispensable/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, indispensable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/indispensable/thesaurus/synonyms>.
MLASmart Define. "indispensable thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/indispensable/thesaurus/synonyms>