Outer shell
Outline and outer shell are semantically related. In some cases you can use "Outline" instead a noun phrase "Outer shell".
Outline
Outline noun - A line that traces the outer limits of an object or surface.
Outer shell and outline are semantically related. You can use "Outer shell" instead a noun "Outline".
Cite this Source
Outline and Outer shell. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/outer_shell/outline
Outer shell & Outline. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/outer_shell/outline>.
Outline or Outer shell. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/outer_shell/outline.
Google Ngram Viewer shows how "outer shell" and "outline" have occurred on timeline