Since
Since adverb - Earlier than the present time.
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Synonyms for Since
Therefore and since are semantically related in because topic. In some cases you can use "Therefore" instead the word "Since" as a preposition or a conjunction.
Therefore
Therefore adverb - For this or that reason.
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Synonyms for Therefore
Since and therefore are semantically related in as a result topic. You can use "Since" instead the word "Therefore" as an adverb or a conjunction.
Mutual synonyms
Both words in one sentence
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This is downplayed, since by the second episode they already have a five-ranger team and, therefore, five Energems.
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Could be justified since there is no longer a threat of Sin and therefore fewer people getting killed by him, thus fewer fiends.
Source: Video Game / Final Fantasy X-2 -
Kiyo and Umagon start out as this, since Kiyo is already a book master and therefore can't be Umagon's.
Source: Manga / Zatch Bell!
Cite this Source
Therefore and Since. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/since/therefore
Since & Therefore. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/since/therefore>.
Therefore or Since. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/since/therefore.
Google Ngram Viewer shows how "since" and "therefore" have occurred on timeline