50 entries under plain topic. ×
| sporty(adjective, simple, easy, straightforward) | |
| throwaway(adjective, simple, easy, straightforward) | |
| unceremonious(adjective, calm, simple, straightforward) | |
| unconventional(adjective, simple, easy, straightforward) | |
| unfussy(adjective, simple, easy, relaxed) | |
| unjaded(simple, fresh, innocent, sincere) | |
| unofficial(adjective, simple, easy, straightforward) | |
| unsuspicious(simple, fresh, innocent, sincere) | |
| urbane(adjective, calm, simple, informal) | |
| sucker(simple, fresh, innocent, sincere) |
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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> |