Core
Core noun - The seat of one's deepest thoughts and emotions.
Underlying and core are semantically related. In some cases you can use "Underlying" instead an adjective "Core".
Nearby Words: cored, coring
Underlying
Underlying adjective - Of or relating to the simplest facts or theories of a subject.
Core and underlying are semantically related. Sometimes you can use "Core" instead an adjective "Underlying".
Mutual synonyms
Both words in one sentence
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So when a work of fiction uses animals for its core cast of thinking, personified characters, what's an author to do about their underlying, well, nudity?
Source: Appropriate Animal Attire -
The underlying theory of the Enneagram is that each of the nine "Enneatypes" has a core "Vice," a single root insecurity that serves as the Freudian Excuse which the entire personality type is thereafter built on.
Source: Useful Notes / The Enneagram - Zhaan had this and other abilities from her training as a Pa'au priestess and while it would sometimes cause her some pain she had an underlying core of tranquility to keep her strong.
Source: The Empath
Cite this Source
Underlying and Core. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/core/underlying
Core & Underlying. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/core/underlying>.
Underlying or Core. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/core/underlying.
Google Ngram Viewer shows how "core" and "underlying" have occurred on timeline