Synonyms|507Antonyms|125|Broader|7Narrower|16Related|1.4k

189 entries under adjective topic. ×

1
elementary(important, significant, original, essential)
1
esoteric(abstract, abstruse, philosophical)
1
essential(important, significant, original, basic)
1
extravagant(intellectual, abstract, unreal, unattainable)
1
first(important, significant, original, essential)
1
formalistic
1
formularized
1
foundational(important, significant, original, essential)
1
grass-roots(important, significant, original, essential)
1
high-flown(intellectual, supernatural, abstract, spiritual)
1
imponderable
1
in the clouds(expression, idiom, intellectual, unreal)
1
indispensable(important, significant, original, essential)
1
inquisitive
1
instanced
1
integral(important, significant, original, essential)
1
intrinsic(important, significant, original, essential)
1
ivory-tower(wild, unreasonable, useless, intellectual)
1
key(important, significant, original, essential)
1
literary
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ChicagoSmart Define. 2015. "theoretical thesaurus" https://smartdefine.org/theoretical/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, theoretical thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/theoretical/thesaurus/synonyms>.
MLASmart Define. "theoretical thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/theoretical/thesaurus/synonyms>