| primary(adjective, inferior, last, basic) | |
| organic(adjective, unimportant, inorganic) | |
| basic(adjective, insignificant, fundamental, intricate, elementary) | |
| first-class(adjective, important, useful) | |
| key(adjective, insignificant, unimportant) | |
| aforementioned | |
| superior(adjective, important, ordinary, useful, normal) | |
| capital(adjective, inferior, insignificant, essential, main) | |
| chief(adjective, important, inferior, useful, unimportant) | |
| foremost(adjective, order, first) | |
| fundamental(adjective, important, basic) | |
| important(adjective, dull, weak, useful, little) | |
| major(adjective, important, inferior, useful, little) | |
| original | |
| prime | |
| key details(adjective, insignificant, unimportant, minor, subordinate) | |
| mainstream | |
| top(poor, inferior) | |
| underlying(adjective, fundamental, latent) | |
| main(adjective, important, common, inferior, useful) |
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| APA | Smart Define. (2015). secondary thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/secondary/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "secondary thesaurus" https://smartdefine.org/secondary/thesaurus/antonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, secondary thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/secondary/thesaurus/antonyms>. |
| MLA | Smart Define. "secondary thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/secondary/thesaurus/antonyms> |