Original
Original noun - Something from which copies are made.
Primary source and original are semantically related. In some cases you can use "Primary source" instead a noun "Original".
Primary source
Original and primary source are semantically related. You can use "Original" instead a noun phrase "Primary source".
Mutual synonyms
Both terms in one sentence
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Many fans are split over what the primary source really is: the original cartoon is named as such by most, but many others choose the original comic series instead, or the British version thereof, with mixing-and-matching becoming increasingly popular.
Source: Expanded Universe -
Or, if you can pinpoint the original internet attacker, or the primary source for the attack, sue that.
Source: Internet Counterattack - Originally, it required a certain number of ranks in Big Guns to take—this made sense, as the primary source of fire damage in the original games were Flamers, which were classed as Big Guns.
Source: The Artifact / Video Games
Cite this Source
Primary source and Original. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/original/primary_source
Original & Primary source. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/original/primary_source>.
Primary source or Original. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/original/primary_source.
Google Ngram Viewer shows how "original" and "primary source" have occurred on timeline