38 entries under decisive topic. ×

24
needed(verb, adjective, close, correct, exact)
20
compulsory(adjective, significant, essential, basic, vital)
19
obligatory(adjective, right, significant, essential, basic)
17
imperative(adjective, important, significant, essential, critical)
16
mandatory(adjective, right, significant, essential, basic)
15
needful(adjective, important, significant, capital, essential)
10
wanted(verb, adjective, important, significant, serious)
8
prerequisite(adjective, important, significant, essential, critical)
7
binding(adjective, significant, essential, basic, vital)
6
urgent(adjective, important, significant, essential, critical)
5
pressing(adjective, important, significant, serious, essential)
4
de rigueur(expression, adjective, idiom, right, significant)
4
critical(adjective, important, essential, basic, fundamental)
3
compelling(adjective, important, significant, serious, essential)
3
fundamental(adjective, important, significant, capital, essential)
2
chief(adjective, important, significant, serious, capital)
2
coal-and-ice(important, essential, critical, basic, fundamental)
2
exigent(adjective, important, significant, serious, essential)
2
integral(important, essential, critical, basic, fundamental)
2
unavoidable(adjective, certain, significant, essential, sure)
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APASmart Define. (2015). required thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/required/thesaurus/synonyms
ChicagoSmart Define. 2015. "required thesaurus" https://smartdefine.org/required/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, required thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/required/thesaurus/synonyms>.
MLASmart Define. "required thesaurus" 3 November 2015. Web. 20 September 2026. <https://smartdefine.org/required/thesaurus/synonyms>