20
nice(adjective, good, correct, modest, polite)
9
comme il faut(expression, adjective, idiom, proper, polite)
9
proper(adjective, good, right, modest, decent)
8
correct(adjective, good, right, proper, decent)
8
right(adjective, good, polite, decent, courtesy)
7
decorous(adjective, good, appropriate, proper, polite)
6
becoming(adjective, good, proper, polite, decent)
6
decent(adjective, good, polite, courtesy, moral)
6
mandatory(adjective, right, significant, essential, basic)
6
necessary(adjective, right, essential, required, obligatory)
6
obligatory(adjective, right, significant, essential, basic)
5
conventional(adjective, good, right, well-mannered, obligatory)
5
required(adjective, right, significant, essential, basic)
5
seemly(adjective, good, proper, modest, polite)
4
befitting(adjective, good, proper, polite, decent)
4
meet(adjective, good, well-mannered, well-behaved)
3
appropriate(adjective, good, well-mannered, well-behaved)
3
au fait(expression, adjective, good, right, civilized)
3
done(good, well-mannered, well-behaved)
3
fitting(adjective, good, proper, polite, well-mannered)
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APASmart Define. (2015). de rigueur thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/de_rigueur/thesaurus/synonyms
ChicagoSmart Define. 2015. "de rigueur thesaurus" https://smartdefine.org/de_rigueur/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, de rigueur thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/de_rigueur/thesaurus/synonyms>.
MLASmart Define. "de rigueur thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/de_rigueur/thesaurus/synonyms>