Since
Since adverb - Earlier than the present time.
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Synonyms for Since
Upon and since are semantically related in of topic. In some cases you can use "Upon" instead a preposition "Since".
Upon
Upon preposition - In or into contact with.
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Synonyms for Upon
Since and upon are semantically related in of topic. Sometimes you can use "Since" instead a preposition "Upon".
Mutual synonyms
Both words in one sentence
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Since they had been comprehensively beaten in the Falklands War against Britain four years before (something Maradona himself cited), upon which a lot of national pride had been staked, this is perhaps not entirely surprising.
Source: Useful Notes / The World Cup - Since the avatar is continually Reincarnated, there are hundreds if not thousands of past lives the living avatar can call upon for advice and to draw upon during the Avatar State
Source: Living Memory -
Upon first release 3,000 years later he seems to have adopted the identity of a dark avenger, since his magic is all he knows about himself.
Source: Un-Person
Cite this Source
Upon and Since. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/since/upon
Since & Upon. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/since/upon>.
Upon or Since. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/since/upon.
Google Ngram Viewer shows how "since" and "upon" have occurred on timeline