Synonyms|203Antonyms|57|Broader|1Narrower|6Related|114
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irresponsible
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irresponsibly
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liberally
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luxuriance
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makeshift
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naively
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naturals
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of itself(expression, idiom)
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of one's own accord(idiom, adverb, willing)
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of own accord
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of your own accord(expression, idiom, happily, willingly)
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of your own volition
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off the cuff(expression, idiom, impromptu, improv, extemporaneously)
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off the hip(expression, idiom, improv, extemporaneously)
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off the top of head(expression, idiom, impromptu, improv, extemporaneously)
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off top of head(expression, idiom, impromptu, improv, extemporaneously)
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on one's own volition(idiom, adverb, willing)
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on purpose
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optionally(happily, freely, willingly, deliberately, voluntarily)
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overtly
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APASmart Define. (2015). spontaneously thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/spontaneously/thesaurus/synonyms
ChicagoSmart Define. 2015. "spontaneously thesaurus" https://smartdefine.org/spontaneously/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, spontaneously thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/spontaneously/thesaurus/synonyms>.
MLASmart Define. "spontaneously thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/spontaneously/thesaurus/synonyms>