Synonyms|29Antonyms|2|Broader|0Narrower|0Related|51

16 entries under open topic. ×

4
discretionary(adjective, free, voluntary, elective)
3
elective(adjective, free, able, voluntary)
3
facultative(adjective, free, voluntary, elective)
2
voluntary(adjective, free, elective, electoral)
1
arbitrary(adjective, free, voluntary, elective)
1
discretional(adjective, free, voluntary, elective)
0
alternative(free, voluntary, elective)
0
extra(free, voluntary, elective)
0
free(voluntary, elective)
0
no strings attached(expression, idiom, free, voluntary)
0
noncompulsory(free, voluntary, elective)
0
not required(expression, free, voluntary, elective)
0
unforced(free, voluntary, elective)
0
unrestricted(free, voluntary, elective)
0
up to the individual(expression, idiom, free, voluntary)
0
volitional(free, voluntary, elective)
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APASmart Define. (2013). nonobligatory thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/nonobligatory/thesaurus/synonyms
ChicagoSmart Define. 2013. "nonobligatory thesaurus" https://smartdefine.org/nonobligatory/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2013, nonobligatory thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/nonobligatory/thesaurus/synonyms>.
MLASmart Define. "nonobligatory thesaurus" 28 June 2013. Web. 26 September 2026. <https://smartdefine.org/nonobligatory/thesaurus/synonyms>