82 entries under free topic. ×
| automatic(adjective, fake, natural, casual) | |
| unpremeditated(noun, adjective, impulsive, planned) | |
| unplanned(noun, adjective, fake, informal) | |
| impromptu(adjective, adverb, plain, impulsive) | |
| voluntary(adjective, feature, characteristic, deliberate) | |
| offhand(noun, adjective, careless, casual) | |
| gratuitous(adjective, feature, characteristic, deliberate) | |
| immediate(noun, adjective, instinctive, sudden) | |
| unconstrained(adjective, feature, characteristic, simple) | |
| unrehearsed(adjective, plain, impulsive, unprepared) | |
| extempore(adjective, simple, fake, informal) | |
| spur-of-the-moment(noun, adjective, fake, informal) | |
| unasked(adjective, feature, characteristic, regard) | |
| unstudied(adjective, simple, easy, impulsive) | |
| informal(adjective, simple, plain, relaxed) | |
| improvised(adjective, impulsive, willing, impulse) | |
| unbidden(adjective, deliberate, natural, impulsive) | |
| casual(adjective, calm, fake, plain) | |
| unprepared(adjective, ready, impromptu, unplanned) | |
| intended(verb, adjective, feature, characteristic) |
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| APA | Smart Define. (2015). spontaneous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/spontaneous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "spontaneous thesaurus" https://smartdefine.org/spontaneous/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, spontaneous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/spontaneous/thesaurus/synonyms>. |
| MLA | Smart Define. "spontaneous thesaurus" 3 August 2015. Web. 27 September 2026. <https://smartdefine.org/spontaneous/thesaurus/synonyms> |