schnorkel vs snorkel breather

schnorkel and snorkel breather both are nouns.

Word	Noun	Adjective	Verb	Adverb
schnorkel	Yes	No	No	No
snorkel breather	Yes	No	No	No

As nouns, schnorkel and snorkel breather are synonyms defined as:

schnorkel and snorkel breather: 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 schnorkel include breather, schnorchel, snorkel.

schnorkel (noun)	snorkel breather (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