Concave
Coil
Coil verb - To follow a circular or spiral course.
Cite this Source
Coil and Concave. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/concave/coil
Concave & Coil. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/concave/coil>.
Coil or Concave. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/concave/coil.
Google Ngram Viewer shows how "concave" and "coil" have occurred on timeline