Synonyms|861Antonyms|138|Broader|14Narrower|0Related|399

51 entries under obligatory topic. ×

5
decisive(adjective, big, important, significant, substantial)
4
basic(noun, adjective, important, significant, essential)
4
constraining(adjective, required)
3
momentous(adjective, big, important, determined, significant)
2
compulsatory(commanding, required, authoritative, domineering)
2
conclusive(key, necessary, required, pivotal)
2
de rigueur(expression, adjective, significant, essential, basic)
2
irrevocable(necessary, required, conclusive)
2
paramount(adjective, big, important, significant, substantial)
2
principal(adjective, big, important, significant, substantial)
2
significant(adjective, big, important, determined, substantial)
1
all-important(adjective, important, significant, serious, essential)
1
bottom-line(adjective, important, significant, essential, critical)
1
called for(verb, expression, phrasal verb, essential, requirement)
1
cardinal(adjective, important, significant, capital, essential)
1
chief(adjective, big, important, significant, substantial)
1
expedient(adjective, significant, essential, basic, vital)
1
incumbent on(verb, expression, adjective, phrasal verb, significant)
1
quintessential(adjective, significant, essential, basic, vital)
1
unavoidable(adjective, set, strong, significant, essential)
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APASmart Define. (2015). imperative thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/imperative/thesaurus/synonyms
ChicagoSmart Define. 2015. "imperative thesaurus" https://smartdefine.org/imperative/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, imperative thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/imperative/thesaurus/synonyms>.
MLASmart Define. "imperative thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/imperative/thesaurus/synonyms>