Root
Root noun - The central part or aspect of something under consideration.
Usage example: at root, it's a question of the proper limits, if any, of free speech
Substance and root are semantically related in base topic. In some cases you can use "Substance" instead a noun "Root", when it comes to topics like be.
Mutual synonyms
How words are described
Both words in one sentence
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Bar Slide: The basis for one of the physical challenges, albeit with a "root beer-like substance" and later a green slime-type liquid.
Source: Series / Double Dare (1986) - The basis for one of the physical challenges on Double Dare - though with a "root beer-like substance", of course (and later green slime).
Source: Bar Slide - Skwisgaar temporarily quits with a desire to find his father, Pickles gets into the root of his substance abuse issues (and sings about it), and the rather depressing reason why Toki is so enamored with Doctor Rockzo is revealed.
Cite this Source
Substance and Root. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/root/substance
Root & Substance. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/root/substance>.
Substance or Root. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/root/substance.
Google Ngram Viewer shows how "root" and "substance" have occurred on timeline