74 entries under adjective topic. ×

27
compulsory(set, significant, affected, essential)
26
required(right, significant, essential, basic)
22
obligatory(right, significant, affected, essential)
20
necessary(right, essential, obvious, obligation)
16
imperative(set, significant, essential, basic)
16
requisite(significant, essential, basic, vital)
15
indispensable(set, significant, essential, basic)
14
essential(set, significant, basic, vital)
13
binding(set, significant, affected, essential)
12
forced(affected, necessary, strained, unnatural)
10
involuntary(affected, necessary, strained, unnatural)
8
imperious(necessary, commanding, required, authoritative)
8
inevitable(obvious, required, obligatory, inescapable)
8
needed(set, significant, essential, basic)
7
commanding(necessary, required)
7
prerequisite(set, significant, essential, basic)
6
de rigueur(expression, idiom, right, significant)
6
authoritative(official, authorized)
5
compelling(significant, essential, basic, vital)
5
constraining(required, obligatory)
11 years ago|8.6k views|share |citing 
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>