363 entries under adjective topic. ×
| honourable(feature, characteristic) | |
| instant(prompt, emotional, instinctive, sudden) | |
| off-the-cuff(simple, informal, natural, straightforward) | |
| out of the blue | |
| quick(noun, passionate, violent, thoughtless) | |
| unannounced | |
| uncoerced | |
| uncompensated(feature, characteristic, regard) | |
| uncontrived(simple, easy, real, impulsive) | |
| uninvited(willing, arrogant, unexpected, voluntary) | |
| unpaid(feature, characteristic, free, deliberate) | |
| unrequested(willing, arrogant, voluntary, unwelcome) | |
| unrestrained(calm, simple, plain, relaxed) | |
| unsought(willing, arrogant, voluntary, unwelcome) | |
| artless(simple, easy, honest, pure) | |
| brash(thoughtless, impetuous, sudden, unwary) | |
| conditioned(unwilling, obligatory, compulsory) | |
| deliberate(feature, characteristic, free, natural) | |
| down(impulsive, willing, unforced, unprompted) | |
| effortless(calm, quiet, light, smooth) |
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| APA | Smart Define. (2015). spontaneous thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/spontaneous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "spontaneous thesaurus" https://smartdefine.org/spontaneous/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, spontaneous thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/spontaneous/thesaurus/synonyms>. |
| MLA | Smart Define. "spontaneous thesaurus" 3 August 2015. Web. 26 September 2026. <https://smartdefine.org/spontaneous/thesaurus/synonyms> |