84 entries under main topic. ×

6
major(adjective, important, significant, original, essential)
5
center(noun, adjective, support, action, cause)
5
leading(adjective, important, head, significant, beginning)
5
standard(noun, adjective, law, regulation, order)
5
staple(adjective, essential, basic, chief)
4
capital(adjective, important, essential, prime, vital)
4
dominant(adjective, top, important, significant, usual)
4
focal(adjective, important, significant, key)
3
quintessential(adjective, important, significant, essential, basic)
2
foremost(adjective, important, significant, original, essential)
2
normal(adjective, usual, principal, dominant)
2
operative(adjective, usual, principal)
2
ruling(noun, adjective, law, regulation, important)
2
set(adjective, usual, principal)
1
decisive(adjective, important, significant, essential, critical)
1
head(adjective, beginning, opening, original, prime)
1
highest(adjective, original, serious, essential, basic)
1
keynote(noun, adjective, law, support, regulation)
1
nuclear(adjective, body, material, important, significant)
1
number one(expression, adjective, head, beginning, essential)
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APASmart Define. (2016). fundamental thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/fundamental/thesaurus/synonyms
ChicagoSmart Define. 2016. "fundamental thesaurus" https://smartdefine.org/fundamental/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, fundamental thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/fundamental/thesaurus/synonyms>.
MLASmart Define. "fundamental thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/fundamental/thesaurus/synonyms>