Dip
Dip noun - A downward slope.
Shell hole and dip are semantically related. In some cases you can use "Shell hole" instead a noun "Dip".
Shell hole
Cite this Source
Shell hole and Dip. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/dip/shell_hole
Dip & Shell hole. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/dip/shell_hole>.
Shell hole or Dip. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/dip/shell_hole.
Google Ngram Viewer shows how "dip" and "shell hole" have occurred on timeline