Before
Before adverb - So as to precede something in order of time.
Since and before are semantically related. in earlier topic. In some cases you can use "Since" instead the word "Before" as an adverb or a preposition, when it comes to topics like earlier than.
Since
Mutual synonyms
Both words in one sentence
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See him race go-karts with his squad of animal friends, none of whom had ever been seen before or since, mere days before Wacky Wheels was released!
Source: Mascot with Attitude -
Eleventh Hour Superpower: Burning Godzilla hasn't been seen in a movie before or since, and it makes sense since this was made for the "final" film of the Heisei series.
Source: Film / Godzilla vs. Destoroyah - One of these one-off characters is shown to be Ten-Forward's secondary bartender (in lieu of Guinan) who is well-known enough to be a confidante, but had never been referenced before or since.
Cite this Source
Since and Before. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/before/since
Before & Since. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/before/since>.
Since or Before. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/before/since.
Google Ngram Viewer shows how "before" and "since" have occurred on timeline