45 entries under essential topic. ×

7
major(adjective, lead, important, head, significant)
6
critical(adjective, important, significant, vital)
5
outstanding(adjective, head, core, key)
5
overruling(adjective, serious, basic, prime)
5
predominant(adjective, head, core, key)
5
visceral(adjective, individual, private, mental)
4
deep-seated(adjective, individual, original, private)
4
elemental(adjective, important, significant, original)
4
first(adjective, top, important, significant, original)
4
gut(adjective, individual, private, mental)
4
inmost(adjective, basic, main, middle)
4
integral(adjective, important, significant, original)
4
viscerous(adjective, individual, private, mental)
3
deep(adjective, original, basic, primary)
3
underlying(adjective, top, important, significant, original)
2
controlling(adjective, head, core, key)
2
material(significant, basic, vital, imperative)
2
number one(expression, adjective, lead, head, master)
2
preeminent(adjective, head, serious, basic)
2
primitive(top, important, significant, original)
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APASmart Define. (2015). central thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/central/thesaurus/synonyms
ChicagoSmart Define. 2015. "central thesaurus" https://smartdefine.org/central/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, central thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/central/thesaurus/synonyms>.
MLASmart Define. "central thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/central/thesaurus/synonyms>