Fat
Fat adjective - Having a greater than usual measure across.
Usage example: a set of fat encyclopedia volumes took up the whole shelf
Substantial and fat are semantically related. in thick topic. In some cases you can use "Substantial" instead an adjective "Fat", when it comes to topics like large.
Substantial
Substantial adjective - Of a size greater than average of its kind.
Usage example: the amount he inherited was quite substantial, so he quit his job and set out to see the world
Fat and substantial are semantically related. Sometimes you can use "Fat" instead an adjective "Substantial".
Mutual synonyms
Both words in one sentence
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While not as fat as some of the examples listed here, he does have a fairly substantial gut, as well as a fairly substantial ability to kick your ass.
Source: Stout Strength
Cite this Source
Substantial and Fat. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/fat/substantial
Fat & Substantial. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/fat/substantial>.
Substantial or Fat. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/fat/substantial.
Google Ngram Viewer shows how "fat" and "substantial" have occurred on timeline