81 entries under informal topic. ×
| natural(adjective, calm, open, simple, plain) | |
| unplanned(noun, adjective, free, fake) | |
| extempore(adjective, free, simple, fake) | |
| spur-of-the-moment(noun, adjective, free, fake) | |
| casual(adjective, calm, free, fake, plain) | |
| snap(noun, adjective, light, free, simple) | |
| open(adjective, calm, simple, easy) | |
| off-the-cuff(adjective, simple, natural, straightforward) | |
| forthright(adjective, calm, quiet, open, light) | |
| improv(adjective, free, simple, fake) | |
| improvisatory(free, casual, impulsive, impulse) | |
| improvise(impulse, unplanned, extemporize, off-the-cuff) | |
| improviso(free, casual, unprepared, unplanned) | |
| laid-back(adjective, simple, easy, plain) | |
| relaxed(adjective, calm, quiet, light, smooth) | |
| ad libitum(expression, unplanned, extemporize, off-the-cuff) | |
| at ease(expression, adjective, calm, quiet, light) | |
| at first glance(expression, free, snap, unrehearsed) | |
| by ear(expression, free, casual, unrehearsed) | |
| calm(adjective, quiet, light, smooth, simple) |
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| APA | Smart Define. (2015). spontaneous thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/spontaneous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "spontaneous thesaurus" https://smartdefine.org/spontaneous/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, spontaneous thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/spontaneous/thesaurus/synonyms>. |
| MLA | Smart Define. "spontaneous thesaurus" 3 August 2015. Web. 28 September 2026. <https://smartdefine.org/spontaneous/thesaurus/synonyms> |