| sober-minded | |
| solemn(sound, knowledgeable, cultured, educated, erudite) | |
| solid(adjective, sound, correct, exact, proper) | |
| specific(adjective, close, correct, solid, exact) | |
| spick-and-span(adjective, neat, tidy, thorough, organized) | |
| square | |
| studied(sound, knowledgeable, cultured, educated, erudite) | |
| studious(knowledgeable, cultured, logical, educated, erudite) | |
| subtle | |
| systematized(adjective, neat, tidy, uniform, thorough) | |
| technicological | |
| to rights(expression, adjective, neat, tidy, thorough) | |
| together(neat, tidy, thorough, organized, formal) | |
| uncluttered(adjective, neat, tidy, thorough, organized) | |
| undeviating | |
| unideal | |
| unidealistic | |
| uniform(adjective, neat, tidy, thorough, organized) | |
| unromantic | |
| unsentimental |
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| APA | Smart Define. (2015). scientific thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/scientific/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "scientific thesaurus" https://smartdefine.org/scientific/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, scientific thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/scientific/thesaurus/synonyms>. |
| MLA | Smart Define. "scientific thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/scientific/thesaurus/synonyms> |