Synonyms|222Antonyms|126|Broader|3Narrower|0Related|351

6 entries under adjective topic. ×

3
elective
3
facultative
2
ex gratia
2
nonmandatory
1
nonobligatory
0
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APASmart Define. (2015). optional thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/optional/thesaurus/related
ChicagoSmart Define. 2015. "optional thesaurus" https://smartdefine.org/optional/thesaurus/related (accessed September 22, 2026).
HarvardSmart Define 2015, optional thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/optional/thesaurus/related>.
MLASmart Define. "optional thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/optional/thesaurus/related>