First cause
First cause noun - An agent that is the cause of all things but does not itself have a cause.
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Synonyms for First cause
Root and first cause are semantically related in prime cause topic. In some cases you can use "Root" instead a noun phrase "First cause", when it comes to topics like original cause.
Root
Root noun - A point or place at which something is invented or provided.
First cause and root are semantically related in prime cause topic. You can use "First cause" instead a noun "Root", if it concerns topics such as original cause.
Mutual synonyms
Cite this Source
Root and First cause. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/first_cause/root
First cause & Root. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/first_cause/root>.
Root or First cause. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/first_cause/root.
Google Ngram Viewer shows how "first cause" and "root" have occurred on timeline