convertibility vs fungibility

convertibility and fungibility both are nouns.

Word	Noun	Adjective	Verb	Adverb
convertibility	Yes	No	No	No
fungibility	Yes	No	No	No

As nouns, fungibility is a hypernym of convertibility; that is, fungibility is a word with a broader meaning than convertibility:

convertibility: the quality of being exchangeable (especially the ability to convert a currency into gold or other currencies without restriction)
fungibility: the quality of being capable of exchange or interchange

Other hypernyms of convertibility include exchangeability, interchangeability, interchangeableness.

convertibility (noun)	fungibility (noun)
the quality of being exchangeable (especially the ability to convert a currency into gold or other currencies without restriction)	the quality of being capable of exchange or interchange