47 entries under compulsory topic. ×

19
mandatory(adjective, right, significant, affected, essential)
16
requisite(adjective, appropriate, proper, significant, suitable)
15
essential(adjective, important, significant, critical, basic)
15
imperative(adjective, important, significant, essential, basic)
15
required(adjective, right, significant, essential, basic)
13
binding(adjective, sound, certain, true, significant)
5
de rigueur(expression, adjective, right, significant, essential)
5
forced(adjective, affected, strained, artificial, unwilling)
5
unavoidable(adjective, certain, significant, essential, basic)
4
enforced(adjective, affected, essential, strained, unnatural)
1
begrudging(affected, strained, forced, unwilling, unnatural)
1
grudging(affected, strained, forced, unwilling, unnatural)
1
prescribed(adjective, expected, predictable, necessary, inexorable)
1
unwilling(adjective, affected, impulsive, strained, artificial)
0
appropriate(suitable, fitting, mandatory)
0
automatic
0
blind(forced, unwilling)
0
called for(expression, right, essential, necessary)
0
condign(appropriate, suitable, expected, fitting, due)
0
conditioned(forced, unwilling)
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APASmart Define. (2015). obligatory thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/obligatory/thesaurus/synonyms
ChicagoSmart Define. 2015. "obligatory thesaurus" https://smartdefine.org/obligatory/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, obligatory thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/obligatory/thesaurus/synonyms>.
MLASmart Define. "obligatory thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/obligatory/thesaurus/synonyms>