bathyscaph vs bathyscaphe

bathyscaph and bathyscaphe both are nouns.

Word	Noun	Adjective	Verb	Adverb
bathyscaph	Yes	No	No	No
bathyscaphe	Yes	No	No	No

As nouns, bathyscaph and bathyscaphe are synonyms defined as:

bathyscaph and bathyscaphe: navigable deep diving vessel for underwater exploration

Other synonyms of bathyscaph include bathyscape.

bathyscaph (noun)	bathyscaphe (noun)
navigable deep diving vessel for underwater exploration	navigable deep diving vessel for underwater exploration