- Definitions|3
- Thesaurus|1k
- Abbreviations|0
11 entries under principal topic. ×
| crucial(adjective, important, essential, prime, main) | |
| foremost(adjective, adverb, important, master, essential) | |
| first(adjective, important, master, essential, key) | |
| head(noun, adjective, important, essential, main) | |
| paramount(adjective, important, essential, main, chief) | |
| supreme(adjective, important, essential, main, chief) | |
| controlling(adjective, important, essential, main, chief) | |
| outstanding(adjective, important, essential, main, chief) | |
| stellar(adjective, important, essential, main, chief) | |
| critical(adjective, main, predominant) | |
| prevailing(adjective, main, predominant) |
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| APA | Smart Define. (2015). ancillary thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/ancillary/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "ancillary thesaurus" https://smartdefine.org/ancillary/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, ancillary thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/ancillary/thesaurus/antonyms>. |
| MLA | Smart Define. "ancillary thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/ancillary/thesaurus/antonyms> |