45 entries under original topic. ×

1
integral(adjective, important, significant, essential)
1
intrinsic(adjective, important, significant, essential)
1
key(adjective, important, significant, essential)
1
major(adjective, important, significant, essential)
1
meat-and-potatoes(adjective, important, significant, essential)
1
necessary(adjective, important, significant, essential)
1
paramount(adjective, important, significant, essential)
1
primary(adjective, important, significant, essential)
1
prime(adjective, important, significant, essential)
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primitive(adjective, important, significant, essential)
1
primordial(adjective, important, significant, essential)
1
principal(adjective, important, significant, essential)
1
radical(adjective, important, significant, essential)
1
requisite(adjective, important, significant, essential)
1
rudimentary(adjective, important, significant, essential)
1
significant(adjective, important, essential, basic)
1
structural(important, significant, basic, vital)
1
substratal(adjective, important, significant, essential)
1
substrative(adjective, important, significant, essential)
1
theoretical(adjective, important, significant, essential)
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APASmart Define. (2015). supporting thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/supporting/thesaurus/synonyms
ChicagoSmart Define. 2015. "supporting thesaurus" https://smartdefine.org/supporting/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, supporting thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/supporting/thesaurus/synonyms>.
MLASmart Define. "supporting thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/supporting/thesaurus/synonyms>