| reasonable | |
| recondite(sound, knowledgeable, cultured, educated, erudite) | |
| regular(adjective, correct, solid, exact, proper) | |
| regulated(adjective, neat, tidy, thorough, organized) | |
| religious | |
| right(adjective, close, correct, sharp, solid) | |
| sage(knowledgeable, cultured, educated, erudite, enlightened) | |
| sane | |
| sapient(sound, knowledgeable, cultured, educated, erudite) | |
| scientifically | |
| scientistic | |
| scrupulous(adjective, close, correct, solid, exact) | |
| secular | |
| sensible | |
| set-up(neat, tidy, thorough, organized, arranged) | |
| sharp(adjective, correct, solid, exact, proper) | |
| show | |
| skilled(sound, familiar, knowledgeable, informed, experienced) | |
| skillful(adjective, close, correct, solid, exact) | |
| slick(adjective, neat, tidy, thorough, organized) |
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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> |