- Definitions|1
- Thesaurus|352
- Abbreviations|0
| arguable(adjective, sound, sensible, rational, practical) | |
| attentive(reasonable, sane) | |
| au courant(expression, reasonable, sane) | |
| authentic(honest, sensible, reliable, accurate, ethical) | |
| aware(reasonable, sensible, rational, stable, sane) | |
| balanced and reliable(expression, idiom) | |
| business-like | |
| businesslike(reasonable, sharp, sensible, practical, shrewd) | |
| calm and sensible(expression, idiom) | |
| canny(reasonable, sane) | |
| casual(adjective, calm, unruffled, nonchalant) | |
| cerebral(adjective, sound, sensible, rational, practical) | |
| civilized | |
| clear-cut(adjective, sound, sensible, rational, practical) | |
| cogitative | |
| cognitive(adjective, sound, sensible, rational, practical) | |
| cognizant(reasonable, sensible, rational, stable, sane) | |
| common-sense | |
| complacent(calm, cool, steady, unflappable) | |
| compos mentis |
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| APA | Smart Define. (2015). level-headed thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/level-headed/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "level-headed thesaurus" https://smartdefine.org/level-headed/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, level-headed thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/level-headed/thesaurus/synonyms>. |
| MLA | Smart Define. "level-headed thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/level-headed/thesaurus/synonyms> |