- Definitions|1
- Thesaurus|381
- Abbreviations|0
| voluntarily(adverb, willing, happily, willingly, openly) | |
| freely(adjective, adverb, impulsive, willing, impromptu) | |
| extemporaneously(adverb, impromptu, impulsively, improv, extemporaneously) | |
| willingly(adverb, willing, happily, freely, openly) | |
| automatically(adverb, improv, extemporaneously) | |
| impulsively(adverb, impulsively) | |
| by chance | |
| casually | |
| ad lib(expression, idiom, adverb, impromptu, improv) | |
| ad libitum(expression, adjective, idiom, adverb, improv) | |
| accidentally | |
| by choice(expression, adverb, happily, freely, willingly) | |
| impromptu(adverb, improv, extemporaneously) | |
| instinctively | |
| involuntarily | |
| naturally(adverb, unrestrictedly) | |
| rashly(adverb, impulsively) | |
| hastily(adverb, impulsively) | |
| abruptly(adverb, impulsively) | |
| ad-lib(adverb, manner, improv, extemporaneously) |
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| APA | Smart Define. (2015). spontaneously thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/spontaneously/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "spontaneously thesaurus" https://smartdefine.org/spontaneously/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, spontaneously thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/spontaneously/thesaurus/synonyms>. |
| MLA | Smart Define. "spontaneously thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/spontaneously/thesaurus/synonyms> |