Outer wall
Shell and outer wall are semantically related. In some cases you can use "Shell" instead a noun phrase "Outer wall".
Shell
Shell noun - Something that encloses another thing especially to protect it.
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Synonyms for Shell
Cite this Source
Shell and Outer wall. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/outer_wall/shell
Outer wall & Shell. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/outer_wall/shell>.
Shell or Outer wall. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/outer_wall/shell.
Google Ngram Viewer shows how "outer wall" and "shell" have occurred on timeline