Backstop
Backstop noun - (baseball) a fence or screen (as behind home plate) to prevent the ball from traveling out of the playing field.
Shackles
Cite this Source
Shackles and Backstop. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/backstop/shackles
Backstop & Shackles. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/backstop/shackles>.
Shackles or Backstop. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/backstop/shackles.
Google Ngram Viewer shows how "backstop" and "shackles" have occurred on timeline