4 entries under expression topic. ×

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gas mask(noun, ventilator, respirator)
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iron lung(noun, ventilator, respirator)
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life support machine(noun, idiom, ventilator, respirator)
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oxygen mask(noun, ventilator, respirator)
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APASmart Define. (2013). breathing apparatus thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/breathing_apparatus/thesaurus/synonyms
ChicagoSmart Define. 2013. "breathing apparatus thesaurus" https://smartdefine.org/breathing_apparatus/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2013, breathing apparatus thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/breathing_apparatus/thesaurus/synonyms>.
MLASmart Define. "breathing apparatus thesaurus" 19 May 2013. Web. 25 September 2026. <https://smartdefine.org/breathing_apparatus/thesaurus/synonyms>