11
primary(adjective, inferior, last, basic)
5
organic(adjective, unimportant, inorganic)
4
basic(adjective, insignificant, fundamental, intricate, elementary)
4
first-class(adjective, important, useful)
3
key(adjective, insignificant, unimportant)
3
aforementioned
3
superior(adjective, important, ordinary, useful, normal)
2
capital(adjective, inferior, insignificant, essential, main)
2
chief(adjective, important, inferior, useful, unimportant)
2
foremost(adjective, order, first)
2
fundamental(adjective, important, basic)
2
important(adjective, dull, weak, useful, little)
2
major(adjective, important, inferior, useful, little)
2
original
2
prime
2
key details(adjective, insignificant, unimportant, minor, subordinate)
2
mainstream
2
top(poor, inferior)
2
underlying(adjective, fundamental, latent)
1
main(adjective, important, common, inferior, useful)
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APASmart Define. (2015). secondary thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/secondary/thesaurus/antonyms
ChicagoSmart Define. 2015. "secondary thesaurus" https://smartdefine.org/secondary/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, secondary thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/secondary/thesaurus/antonyms>.
MLASmart Define. "secondary thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/secondary/thesaurus/antonyms>