External surface
Sheath and external surface are semantically related. In some cases you can use "Sheath" instead a noun phrase "External surface".
Sheath
Sheath noun - Something that encloses another thing especially to protect it.
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Synonyms for Sheath
External surface and sheath are semantically related. Sometimes you can use "External surface" instead a noun "Sheath".
Cite this Source
Sheath and External surface. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/external_surface/sheath
External surface & Sheath. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/external_surface/sheath>.
Sheath or External surface. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/external_surface/sheath.
Google Ngram Viewer shows how "external surface" and "sheath" have occurred on timeline