35 entries under imperative topic. ×

24
needed(verb, adjective, close, correct, exact)
22
essential(adjective, important, significant, critical, basic)
20
compulsory(adjective, significant, essential, basic, vital)
19
requisite(adjective, close, correct, exact, important)
19
indispensable(adjective, important, significant, serious, essential)
19
obligatory(adjective, right, significant, essential, basic)
16
mandatory(adjective, right, significant, essential, basic)
15
needful(adjective, important, significant, capital, essential)
11
vital(adjective, important, significant, serious, 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
crucial(adjective, important, significant, serious, capital)
3
basic(adjective, important, significant, essential, critical)
3
compelling(adjective, important, significant, serious, essential)
3
fundamental(adjective, important, significant, capital, essential)
2
cardinal(adjective, important, significant, capital, essential)
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APASmart Define. (2015). required thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/required/thesaurus/synonyms
ChicagoSmart Define. 2015. "required thesaurus" https://smartdefine.org/required/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, required thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/required/thesaurus/synonyms>.
MLASmart Define. "required thesaurus" 3 November 2015. Web. 21 September 2026. <https://smartdefine.org/required/thesaurus/synonyms>