Holes
Safety valves and holes are semantically related. In some cases you can use "Safety valves" instead a noun "Holes".
Safety valves
Holes and safety valves are semantically related. Sometimes you can use "Holes" instead a noun phrase "Safety valves".
Cite this Source
Safety valves and Holes. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/holes/safety_valves
Holes & Safety valves. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/holes/safety_valves>.
Safety valves or Holes. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/holes/safety_valves.
Google Ngram Viewer shows how "holes" and "safety valves" have occurred on timeline