Original source
Primary source and original source are semantically related in source topic. In some cases you can use "Primary source" instead a noun "Original source", when it comes to topics like fountainhead.
Primary source
Original source and primary source are semantically related in source topic. You can use "Original source" instead a noun phrase "Primary source", if it concerns topics such as fountainhead.
Mutual synonyms
Cite this Source
Primary source and Original source. (2017). Retrieved 2026, July 22, from https://thesaurus.plus/related/original_source/primary_source
Original source & Primary source. N.p., 2017. Web. 22 Jul. 2026. <https://thesaurus.plus/related/original_source/primary_source>.
Primary source or Original source. 2017. Accessed July 22, 2026. https://thesaurus.plus/related/original_source/primary_source.
Google Ngram Viewer shows how "original source" and "primary source" have occurred on timeline