Synonyms|527Antonyms|111|Broader|20Narrower|54Related|356

52 entries under essential topic. ×

3
head(noun, adjective, important, main)
3
paramount(adjective, important, main, chief)
3
primal(adjective, base, important, basic)
3
supreme(adjective, important, main, chief)
3
considerable(adjective, prime, vital, necessary)
3
constitutional(adjective, prime, vital, necessary)
3
controlling(adjective, important, main, chief)
3
outstanding(adjective, important, main, chief)
3
stellar(adjective, important, main, chief)
2
basic(adjective, prime, main, necessary)
2
fundamental(adjective, prime, main, necessary)
2
initial(adjective, prime, vital, necessary)
2
decisive(adjective, prime, main, necessary)
2
imperative(adjective, prime, main, necessary)
1
consequential(adjective, important, main, chief)
1
constitutive(adjective, important, significant, substantial)
1
momentous(adjective, important, main, chief)
1
preeminent(adjective, important, main, chief)
1
uppermost(adjective, important, main, chief)
1
weighty(adjective, important, main, chief)
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ChicagoSmart Define. 2015. "ancillary thesaurus" https://smartdefine.org/ancillary/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, ancillary thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/ancillary/thesaurus/antonyms>.
MLASmart Define. "ancillary thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/ancillary/thesaurus/antonyms>