Cavity
Cavity noun - A sunken area forming a separate space.
Subterranean area and cavity are semantically related In some cases you can use "Subterranean area" instead a noun "Cavity".
Subterranean area
Cavity and subterranean area are semantically related in hole in land formation topic. You can use "Cavity" instead a noun phrase "Subterranean area".
Cite this Source
Subterranean area and Cavity. (2016). Retrieved 2026, July 30, from https://thesaurus.plus/related/cavity/subterranean_area
Cavity & Subterranean area. N.p., 2016. Web. 30 Jul. 2026. <https://thesaurus.plus/related/cavity/subterranean_area>.
Subterranean area or Cavity. 2016. Accessed July 30, 2026. https://thesaurus.plus/related/cavity/subterranean_area.
Google Ngram Viewer shows how "cavity" and "subterranean area" have occurred on timeline