Core
Core noun - The main or greater part of something as distinguished from its subordinate parts.
Usage example: a starfish can even survive the division of its core into two parts; both halves then regenerate
Main is a synonym for core in principal topic. In some cases you can use "Main" instead the word "Core" as an adjective or a noun, when it comes to topics like major, fundamental, basic, central.
Nearby Words: cored, coring
Main
Main noun - The main or greater part of something as distinguished from its subordinate parts.
Usage example: the main of the tree is still healthy
Core is a synonym for main in principal topic. Sometimes you can use "Core" instead the word "Main" as a noun or an adjective, if it concerns topics such as major, fundamental, basic.
How words are described
Both words in one sentence
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Succession Crisis: The core and the main conflict of the series.
Source: Series / Camelot -
They're both businessmen and at the core want the same thing out of life, the main difference between the two being that Gordon has actually achieved it.Mac: I'd make a terrific Gordon, Gordon.
Source: Film / Local Hero - Notably, this was at a range of at least a mile, and the sword went ''through'' Liberty Prime, impaling the main power core, and Liberty Prime is a Humongous Mecha.
Source: Roleplay / World War X
Cite this Source
Main and Core. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/core/main
Core & Main. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/core/main>.
Main or Core. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/core/main.
Google Ngram Viewer shows how "core" and "main" have occurred on timeline