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

87 entries under adjective topic. ×

4
significant(important, essential, prime, main)
3
foremost(adverb, important, master, essential)
3
basal(base, basic, key, main)
3
dominant(essential, prime, vital, necessary)
3
elemental(base, basic, key, main)
3
first(important, master, essential, key)
3
head(noun, important, essential, main)
3
indispensable(base, basic, key, main)
3
paramount(important, essential, main, chief)
3
primal(base, important, essential, basic)
3
supreme(important, essential, main, chief)
3
considerable(essential, prime, vital, necessary)
3
constitutional(essential, prime, vital, necessary)
3
controlling(important, essential, main, chief)
3
outstanding(important, essential, main, chief)
3
stellar(important, essential, main, chief)
2
basic(essential, prime, main, necessary)
2
fundamental(essential, prime, main, necessary)
2
initial(essential, prime, vital, necessary)
2
decisive(essential, prime, main, necessary)
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APASmart Define. (2015). ancillary thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/ancillary/thesaurus/antonyms
ChicagoSmart Define. 2015. "ancillary thesaurus" https://smartdefine.org/ancillary/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, ancillary thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/ancillary/thesaurus/antonyms>.
MLASmart Define. "ancillary thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/ancillary/thesaurus/antonyms>