8
designed(adjective, deliberate, determined, careful, thoughtful)
8
discretional(adjective, feature, characteristic, open, free)
8
honorary(adjective, feature, characteristic, honor, free)
8
unconstrained(adjective, feature, characteristic, free, simple)
7
chosen(adjective, feature, characteristic, free, deliberate)
7
discretionary(adjective, open, free, will, elective)
7
elective(adjective, open, free, able)
7
honourable(adjective, feature, characteristic, honor)
7
studied(adjective, deliberate, determined, careful, thoughtful)
7
unasked(adjective, feature, characteristic, free, keen)
7
unbidden(adjective, free, simple, keen, happy)
7
unsolicited(adjective, for, uninvited, unsought)
6
elected(adjective, feature, characteristic, free, deliberate)
6
planned(adjective, deliberate, determined, careful, thoughtful)
6
witting(adjective, set, direct, free, keen)
5
calculated(adjective, deliberate, careful, thoughtful, cautious)
5
commemorative(adjective, feature, characteristic, honor)
5
honorable(adjective, feature, characteristic, honor)
5
honorific(adjective, feature, characteristic, honor)
5
military volunteer(noun, expression, idiom)
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APASmart Define. (2015). voluntary thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/voluntary/thesaurus/synonyms
ChicagoSmart Define. 2015. "voluntary thesaurus" https://smartdefine.org/voluntary/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, voluntary thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/voluntary/thesaurus/synonyms>.
MLASmart Define. "voluntary thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/voluntary/thesaurus/synonyms>