19 entries under voluntary topic. ×
| discretionary(adjective, open, free, choice) | |
| elective(adjective, open, free, choice, able) | |
| optional(adjective, choice, possible, elective) | |
| discretional(adjective, open, free, elective) | |
| nonobligatory(adjective, open, free, elective) | |
| arbitrary(adjective, open, free, elective) | |
| free(adjective, open, elective) | |
| noncompulsory(adjective, open, free, elective) | |
| not required(expression, adjective, open, free) | |
| unforced(adjective, open, free, elective) | |
| volitional(adjective, open, free, elective) | |
| alternative(open, free, elective) | |
| extra(open, free, elective) | |
| no strings attached(expression, idiom, open, free) | |
| open(free, elective) | |
| possible | |
| uncompelled | |
| unrestricted(open, free, elective) | |
| up to the individual(expression, idiom, open, free) |
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| APA | Smart Define. (2013). facultative thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/facultative/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "facultative thesaurus" https://smartdefine.org/facultative/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2013, facultative thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/facultative/thesaurus/synonyms>. |
| MLA | Smart Define. "facultative thesaurus" 28 June 2013. Web. 24 September 2026. <https://smartdefine.org/facultative/thesaurus/synonyms> |