Synonyms|56Antonyms|2|Broader|0Narrower|0Related|27

18 entries under voluntary topic. ×

3
optional(adjective, extra, worthless, possible, pointless)
1
alternative(adjective, open, free, elective)
1
arbitrary(adjective, open, free, elective)
1
discretional(adjective, open, free, elective)
1
discretionary(adjective, open, free, elective)
1
elective(adjective, open, free)
1
extra(adjective, open, free, unnecessary, superfluous)
1
facultative(adjective, open, free, elective)
1
no strings attached(expression, adjective, idiom, open, free)
1
nonobligatory(adjective, open, free, elective)
1
unforced(adjective, open, free, elective)
1
up to the individual(expression, adjective, idiom, open, free)
1
volitional(adjective, open, free, elective)
0
free(adjective, open, elective)
0
open(adjective, free, elective)
0
possible(adjective, elective)
0
uncompelled(adjective, elective)
0
unrestricted(adjective, open, free, elective)
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ChicagoSmart Define. 2013. "noncompulsory thesaurus" https://smartdefine.org/noncompulsory/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2013, noncompulsory thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/noncompulsory/thesaurus/synonyms>.
MLASmart Define. "noncompulsory thesaurus" 17 June 2013. Web. 25 September 2026. <https://smartdefine.org/noncompulsory/thesaurus/synonyms>