Since
Since adverb - Earlier than the present time.
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Synonyms for Since
So and since are semantically related. In some cases you can use "So" instead the word "Since" as an adverb or a conjunction.
So
So adverb - For this or that reason.
Since and so are semantically related. Sometimes you can use "Since" instead the word "So" as an adverb or a conjunction.
Mutual synonyms
Cite this Source
So and Since. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/since/so
Since & So. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/since/so>.
So or Since. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/since/so.
Google Ngram Viewer shows how "since" and "so" have occurred on timeline