61 entries under required topic. ×

27
compulsory(adjective, set, significant, affected, essential)
26
required(adjective, right, significant, essential, basic)
22
obligatory(adjective, right, significant, affected, essential)
20
necessary(adjective, right, essential, obvious, obligation)
16
imperative(adjective, set, significant, essential, basic)
16
requisite(adjective, significant, essential, basic, vital)
15
indispensable(adjective, set, significant, essential, basic)
14
essential(adjective, set, significant, basic, vital)
13
binding(adjective, set, significant, affected, essential)
12
forced(adjective, affected, necessary, strained, unnatural)
10
involuntary(adjective, affected, necessary, strained, unnatural)
8
imperious(adjective, necessary, commanding, authoritative)
8
inevitable(adjective, obvious, obligatory, inescapable)
8
needed(adjective, set, significant, essential, basic)
7
commanding(adjective, necessary)
7
prerequisite(adjective, set, significant, essential, basic)
6
de rigueur(expression, adjective, idiom, right, significant)
5
compelling(adjective, significant, essential, basic, vital)
5
constraining(adjective, obligatory)
5
needful(adjective, set, significant, essential, basic)
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APASmart Define. (2015). mandatory thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/mandatory/thesaurus/synonyms
ChicagoSmart Define. 2015. "mandatory thesaurus" https://smartdefine.org/mandatory/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, mandatory thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/mandatory/thesaurus/synonyms>.
MLASmart Define. "mandatory thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/mandatory/thesaurus/synonyms>