86 entries under adjective topic. ×

3
suitable(good, well-mannered, well-behaved)
2
apt
2
binding(significant, essential, basic, vital)
2
comely(good, proper, modest, polite)
2
compulsory(significant, essential, basic, vital)
2
fit(good, well-mannered, well-behaved)
2
imperative(significant, essential, basic, vital)
2
requisite(significant, essential, basic, vital)
2
swish
1
a must
1
all-important(significant, essential, basic, vital)
1
bottom-line(significant, essential, basic, vital)
1
chief(significant, essential, basic, vital)
1
compelling(significant, essential, basic, vital)
1
conforming to accepted standards(right, obligatory)
1
elegant(good, civilized, well-mannered, staid)
1
exigent(significant, essential, basic, vital)
1
expedient(significant, essential, basic, vital)
1
fundamental(significant, essential, basic, vital)
1
incumbent on(expression, significant, essential, basic)
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APASmart Define. (2015). de rigueur thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/de_rigueur/thesaurus/synonyms
ChicagoSmart Define. 2015. "de rigueur thesaurus" https://smartdefine.org/de_rigueur/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, de rigueur thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/de_rigueur/thesaurus/synonyms>.
MLASmart Define. "de rigueur thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/de_rigueur/thesaurus/synonyms>