84 entries under rational topic. ×
| lucid(adjective, calm, sensible, dark, restrained) | |
| peaceful dull(expression, calm, sensible, dark, restrained) | |
| straight-thinking(straightforward, down-to-earth) | |
| with both feet on the ground(expression, idiom, straightforward, down-to-earth) |
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| APA | Smart Define. (2016). serious thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/serious/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "serious thesaurus" https://smartdefine.org/serious/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, serious thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/serious/thesaurus/synonyms>. |
| MLA | Smart Define. "serious thesaurus" 24 February 2016. Web. 26 September 2026. <https://smartdefine.org/serious/thesaurus/synonyms> |