54 entries under principal topic. ×
| first(adjective, top, important, significant, original) | |
| inmost(adjective, essential, basic, main, middle) | |
| umbilical(adjective, main, middle, centrality) | |
| salient(adjective, significant, vital, main, middle) | |
| ruling(adjective, serious, basic, prime, main) | |
| underlying(adjective, top, important, significant, original) | |
| centroidal(adjective, main, middle) | |
| controlling(adjective, head, essential, core, key) | |
| number one(expression, adjective, lead, head, master) | |
| omphalic(adjective, main, middle) | |
| preeminent(adjective, head, serious, essential, basic) | |
| lead | |
| prominent(adjective, head, essential, main, chief) | |
| top(adjective, first, initial) |
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| APA | Smart Define. (2015). central thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/central/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "central thesaurus" https://smartdefine.org/central/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, central thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/central/thesaurus/synonyms>. |
| MLA | Smart Define. "central thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/central/thesaurus/synonyms> |