54 entries under principal topic. ×

4
first(adjective, top, important, significant, original)
4
inmost(adjective, essential, basic, main, middle)
4
umbilical(adjective, main, middle, centrality)
3
salient(adjective, significant, vital, main, middle)
3
ruling(adjective, serious, basic, prime, main)
3
underlying(adjective, top, important, significant, original)
2
centroidal(adjective, main, middle)
2
controlling(adjective, head, essential, core, key)
2
number one(expression, adjective, lead, head, master)
2
omphalic(adjective, main, middle)
2
preeminent(adjective, head, serious, essential, basic)
0
lead
0
prominent(adjective, head, essential, main, chief)
0
top(adjective, first, initial)
<123>
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APASmart Define. (2015). central thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/central/thesaurus/synonyms
ChicagoSmart Define. 2015. "central thesaurus" https://smartdefine.org/central/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, central thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/central/thesaurus/synonyms>.
MLASmart Define. "central thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/central/thesaurus/synonyms>