58 entries under idiom topic. ×
| not accidental | |
| not obligatory | |
| of causes(expression, assent) | |
| off your own bat(expression, willing, spontaneous, unforced) | |
| on the house(expression, free, gratis) | |
| popular belief(expression, assent) | |
| preparatory school(expression, school) | |
| primary school(expression, school) | |
| public opinion(expression, assent) | |
| rus in urbe(expression, seclusion exclusion) | |
| school of art(expression, school) | |
| state-aided school(expression, school) | |
| technical school(expression, school) | |
| unpaid worker | |
| up to the individual(expression, open, free, elective) | |
| voluntary resistance(expression, counteraction) | |
| voluntary settlement(expression, giving) | |
| vox populi(expression, assent) |
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Voluntary on
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| APA | Smart Define. (2015). voluntary thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/voluntary/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "voluntary thesaurus" https://smartdefine.org/voluntary/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, voluntary thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/voluntary/thesaurus/synonyms>. |
| MLA | Smart Define. "voluntary thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/voluntary/thesaurus/synonyms> |