133 entries under adjective topic. ×

1
real
1
requisite(important, significant, original, essential)
1
rudimental
1
significant(important, original, essential, basic)
1
subliminal
1
substrative(important, significant, original, essential)
1
supporting(important, significant, original, essential)
1
sustaining(important, significant, original, essential)
1
theoretical(important, significant, original, essential)
1
true
1
underived(rough, important, significant, original)
1
undermost(base, last, bottom)
1
unexpressed
1
vestigial
0
Freudian
0
absolute(basic, fundamental, key, central)
0
actual
0
coal-and-ice
0
cold(basic, absolute, fundamental, key)
0
complete(basic, absolute, fundamental, key)
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APASmart Define. (2015). underlying thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/underlying/thesaurus/synonyms
ChicagoSmart Define. 2015. "underlying thesaurus" https://smartdefine.org/underlying/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, underlying thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/underlying/thesaurus/synonyms>.
MLASmart Define. "underlying thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/underlying/thesaurus/synonyms>