Synonyms|665Antonyms|174|Broader|10Narrower|15Related|812

93 entries under basic topic. ×

1
meat-and-potatoes(adjective, important, significant, original, essential)
1
name(important, essential, critical, fundamental)
1
name-of-the-game(important, essential, critical, fundamental)
1
nitty-gritty(adjective, important, original, essential, critical)
1
nuclear(material, natural, living, functional)
1
obligation(noun, want, need, essential, certainty)
1
original(adjective, body, material, important, significant)
1
plasmic(material, natural, living, functional)
1
primordial(adjective, important, significant, original, essential)
1
radical(adjective, important, significant, original, essential)
1
rudimentary(adjective, important, significant, original, essential)
1
structural(material, important, natural, original)
1
substratal(adjective, important, significant, original, essential)
1
substrative(adjective, important, significant, original, essential)
1
supporting(adjective, important, significant, original, essential)
1
sustaining(adjective, important, significant, original, essential)
1
theoretical(adjective, important, significant, original, essential)
1
underived(adjective, important, significant, original, essential)
1
underlined(important, essential, critical, fundamental)
1
urgency(noun, want, need, essential, certainty)
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HarvardSmart Define 2015, necessary thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/necessary/thesaurus/synonyms>.
MLASmart Define. "necessary thesaurus" 2 November 2015. Web. 20 September 2026. <https://smartdefine.org/necessary/thesaurus/synonyms>