breather vs schnorchel

breather and schnorchel both are nouns.

Word	Noun	Adjective	Verb	Adverb
breather	Yes	No	No	No
schnorchel	Yes	No	No	No

As nouns, breather and schnorchel are synonyms defined as:

breather and schnorchel: air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time

Other synonyms of breather include schnorkel, snorkel, snorkel breather.

breather (noun)	schnorchel (noun)
air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time	air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
a short respite