Space
Space noun - An extent or area available for or used up by some activity or thing.
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Synonyms for Space
Upper atmosphere and space are semantically related. In some cases you can use "Upper atmosphere" instead a noun "Space".
Upper atmosphere
Space and upper atmosphere are semantically related. Sometimes you can use "Space" instead a noun phrase "Upper atmosphere".
Mutual synonyms
Both terms in one sentence
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Once she gets to the upper atmosphere she remarks that she's having a hard time breathing, so she turns her sword into a space helmet (don't ask, it's She-Ra).
Source: Batman Can Breathe in Space -
Last Exile has the Guild, who fit a great deal of "alien" stereotypes (live in space/the upper atmosphere, pointy ears, Anime Hair in a setting where everyone else's hair is relatively normal, etc.).
Source: Space Clothes -
A smaller example is the Battle of Coruscant in Revenge of the Sith: That battle wasn't in space, but rather the planet's upper atmosphere.
Source: Inferred Holocaust
Cite this Source
Upper atmosphere and Space. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/space/upper_atmosphere
Space & Upper atmosphere. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/space/upper_atmosphere>.
Upper atmosphere or Space. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/space/upper_atmosphere.
Google Ngram Viewer shows how "space" and "upper atmosphere" have occurred on timeline