56 entries under basic topic. ×

3
principal(adjective, important, significant, original, capital)
2
all-important(adjective, significant, essential, vital)
2
critical(adjective, important, original, vital)
2
unavoidable(adjective, set, significant, essential)
1
binding(adjective, significant, essential, vital)
1
bottom-line(adjective, significant, original, essential)
1
de rigueur(expression, adjective, significant, essential)
1
elementary(adjective, significant, original, essential)
1
expedient(adjective, significant, essential, vital)
1
incumbent on(expression, adjective, significant, essential)
1
momentous(adjective, significant, essential, vital)
1
name of game(expression, adjective, idiom, significant, essential)
1
pressing(adjective, significant, essential, vital)
1
prime(adjective, significant, original, essential)
1
quintessential(adjective, significant, essential, vital)
1
specified(adjective, significant, essential, vital)
0
basal(adjective, original, essential, fundamental)
0
bottom(adjective, original, fundamental, hidden)
0
concealed(adjective, original, fundamental, hidden)
0
decisive(adjective, significant, essential, vital)
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APASmart Define. (2015). needful thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/needful/thesaurus/synonyms
ChicagoSmart Define. 2015. "needful thesaurus" https://smartdefine.org/needful/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, needful thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/needful/thesaurus/synonyms>.
MLASmart Define. "needful thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/needful/thesaurus/synonyms>