breathing machine vs ventilator

breathing machine and ventilator both are nouns.

Word	Noun	Adjective	Verb	Adverb
breathing machine	Yes	No	No	No
ventilator	Yes	No	No	No

As nouns, breathing machine and ventilator are synonyms defined as:

breathing machine and ventilator: a device that facilitates breathing in cases of respiratory failure

Other synonyms of breathing machine include breathing apparatus, breathing device.

breathing machine (noun)	ventilator (noun)
a device that facilitates breathing in cases of respiratory failure	a device (such as a fan) that introduces fresh air or expels foul air
	a device that facilitates breathing in cases of respiratory failure