Parallel
Sideways
Sideways adverb - With one side faced forward.
Mutual synonyms
Both words in one sentence
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In one episode, Amy complains that she is useless at parallel parking, and then easily drives in since hovercars can just move sideways.
Source: Parallel Parking -
Terry Pratchett and Stephen Baxter's The Long Earth takes place in a near future where simple devices allow (nearly) anyone to "step" sideways onto Earth in parallel universes.
Source: Worthless Yellow Rocks - Flash Sideways — Lost named and, along with Sliding Doors, co-codified the trope with its extensive use of parallel timelines in the final season.
Source: This Index Is Not an Example
Cite this Source
Sideways and Parallel. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/parallel/sideways
Parallel & Sideways. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/parallel/sideways>.
Sideways or Parallel. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/parallel/sideways.
Google Ngram Viewer shows how "parallel" and "sideways" have occurred on timeline