Iron lungs
Respirators and iron lungs are semantically related. In some cases you can use "Respirators" instead a noun phrase "Iron lungs".
Respirators
Iron lungs and respirators are semantically related. You can use "Iron lungs" instead a noun "Respirators".
Mutual synonyms
Cite this Source
Respirators and Iron lungs. (2016). Retrieved 2026, July 30, from https://thesaurus.plus/related/iron_lungs/respirators
Iron lungs & Respirators. N.p., 2016. Web. 30 Jul. 2026. <https://thesaurus.plus/related/iron_lungs/respirators>.
Respirators or Iron lungs. 2016. Accessed July 30, 2026. https://thesaurus.plus/related/iron_lungs/respirators.
Google Ngram Viewer shows how "iron lungs" and "respirators" have occurred on timeline