Synonyms|912Antonyms|70|Broader|25Narrower|14Related|751

50 entries under obligatory topic. ×

14
obligatory(adjective, sound, certain, true, significant)
13
necessary(adjective, sound, essential, inexorable, required)
9
essential(adjective, significant, basic, vital, necessary)
8
compulsory(adjective, sound, certain, true, significant)
8
inevitable(adjective, certain, expected, predictable, required)
8
mandatory(adjective, set, significant, affected, essential)
8
required(adjective, significant, essential, basic, vital)
7
imperative(adjective, significant, essential, basic, vital)
6
constraining(verb, adjective, required, restraining)
6
requisite(adjective, significant, essential, basic, vital)
4
compelling(verb, adjective, sound, reasonable, severe)
4
involuntary(adjective, affected, strained, unnatural, required)
3
incumbent
3
indispensable(adjective, significant, essential, basic, vital)
3
pressing(adjective, significant, essential, basic, vital)
2
bounden(adjective, required, obliged)
2
de rigueur(expression, adjective, significant, essential, basic)
2
decisive(adjective, set, severe, firm, powerful)
2
imperious(required, authoritative, unconditional, compulsory)
2
prerequisite(adjective, significant, essential, basic, vital)
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ChicagoSmart Define. 2015. "binding thesaurus" https://smartdefine.org/binding/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, binding thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/binding/thesaurus/synonyms>.
MLASmart Define. "binding thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/binding/thesaurus/synonyms>