18 entries under voluntary topic. ×

21
optional(adjective, choice, able, possible)
8
facultative(adjective, open, free, choice, able)
7
alternative(adjective, open, free, optional)
7
discretional(adjective, open, free, optional)
7
free(adjective, open)
7
unforced(adjective, open, free)
2
arbitrary(adjective, open, free)
2
nonobligatory(adjective, open, free, able)
2
uncompelled
2
volitional(adjective, open, free)
1
no strings attached(expression, adjective, idiom, open, free)
1
noncompulsory(adjective, open, free)
1
not required(expression, adjective, open, free)
1
open(adjective, free)
1
possible
1
unrestricted(adjective, open, free)
1
up to the individual(expression, adjective, idiom, open, free)
0
extra(adjective, open, free)
11 years ago|6k views|share |citing 
APASmart Define. (2015). elective thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/elective/thesaurus/synonyms
ChicagoSmart Define. 2015. "elective thesaurus" https://smartdefine.org/elective/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, elective thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/elective/thesaurus/synonyms>.
MLASmart Define. "elective thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/elective/thesaurus/synonyms>